Search Results: "TED-Ed"

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05:59
Why should you read James Joyce's "Ulysses"? - Sam Slote

661 views / 1 likes - added 6 years ago

Download a free audiobook and support TED-Ed's nonprofit mission: http://adbl.co/2y0J0DT Check out James Joyce's "Ulysses": https://shop.ed.ted.com/collections/ted-ed-book-recommendations/products/ulysses View full lesson: https://ed.ted.com/lessons/why-s
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Why should you read Virgil's "Aeneid"? - Mark Robinson

732 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/why-should-you-read-virgil-s-aeneid-mark-robinson In 19 BC, the Roman poet Virgil suffered heatstroke and died on his journey back to Italy. On his deat
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How did Polynesian wayfinders navigate the Pacific Ocean? - Alan Tamayose and Shantell De Silva

767 views / 1 likes - added 6 years ago

Learn more about TED-Ed Clubs here: https://ed.ted.com/clubs Visit the TED-Ed Clubs YouTube channel: https://www.youtube.com/channel/UCskU_g7t6b5ecsA1CTS3y9Q View full lesson: https://ed.ted.com/lessons/how-did-polynesian-wayfinders-navigate-the-pacific-o
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05:06 Popular
The first asteroid ever discovered - Carrie Nugent

838 views / 1 likes - added 6 years ago

Check out all of TED-Ed's book recommendations: http://ed.ted.com/books View full lesson: https://ed.ted.com/lessons/the-first-asteroid-ever-discovered-carrie-nugent Over the course of history, we’ve discovered hundreds of thousands of asteroids. But how
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05:23
Why is it so hard to cure cancer? - Kyuson Yun

664 views / 1 likes - added 6 years ago

Download a free audiobook and support TED-Ed's nonprofit mission: http://adbl.co/2gauxND Check out Siddhartha Mukherjee's "The Emperor of All Maladies": https://shop.ed.ted.com/collections/ted-ed-book-recommendations/products/the-emperor-of-all-maladies-a
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Is DNA the future of data storage? - Leo Bear-McGuinness

984 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/is-dna-the-future-of-data-storage-leo-bear-mcguinness In the event of a nuclear fallout, every piece of digital and written information could all be los
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06:03 Popular
Why should you read Virginia Woolf? - Iseult Gillespie

949 views / 0 likes - added 6 years ago

Download a free audiobook and support TED-Ed's nonprofit mission: http://www.audible.com/teded View full lesson: https://ed.ted.com/lessons/why-should-you-read-virginia-woolf-iseult-gillespie How best can we understand the internal experience of alienatio
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The strange case of the cyclops sheep - Tien Nguyen

703 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-strange-case-of-the-cyclops-sheep-tien-nguyen In the 1950s, a group of ranchers in Idaho were baffled when their sheep gave birth to lambs with only
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How aspirin was discovered - Krishna Sudhir

846 views / 1 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-aspirin-was-discovered-krishna-sudhir 4000 years ago, the ancient Sumerians made a surprising discovery: if they scraped the bark off a particular k
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05:35
The surprising cause of stomach ulcers - Rusha Modi

508 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-surprising-cause-of-stomach-ulcers-rusha-modi It’s a common misconception that stomach ulcers are caused by emotional upset, psychological distress,
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Are you a body with a mind or a mind with a body? - Maryam Alimardani

988 views / 0 likes - added 6 years ago

Download a free audiobook and support TED-Ed's nonprofit mission: http://www.audible.com/teded View full lesson: https://ed.ted.com/lessons/are-you-a-body-with-a-mind-or-a-mind-with-a-body-maryam-alimardani Our bodies – the physical, biological parts of u
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04:43 Popular
A brief history of banned numbers - Alessandra King

825 views / 2 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/a-brief-history-of-banned-numbers-alessandra-king They say the pen is mightier than the sword, and authorities have often agreed. From outlawed religiou
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Why do we harvest horseshoe crab blood? - Elizabeth Cox

1,230 views / 1 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/why-do-we-harvest-horseshoe-crab-blood-elizabeth-cox During the warmer months, especially at night during the full moon, horseshoe crabs emerge from the
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05:41 Popular
Should we get rid of standardized testing? - Arlo Kempf

782 views / 0 likes - added 6 years ago

Download a free audiobook and support TED-Ed's nonprofit mission: http://www.audible.com/teded View full lesson: https://ed.ted.com/lessons/should-we-get-rid-of-standardized-testing-arlo-kempf Although standardized testing is a particularly hot topic in e
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How do executive orders work? - Christina Greer

788 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-do-executive-orders-work-christina-greer On January 1, 1863, Abraham Lincoln legally changed the status of over 3 million people from “slave” to “fr
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What are gravitational waves? - Amber L. Stuver

1,195 views / 0 likes - added 6 years ago

Check out all of TED-Ed's book recommendations: http://ed.ted.com/books Check out Neil deGrasse Tyson's "Astrophysics for People in a Hurry": https://shop.ed.ted.com/collections/ted-ed-book-recommendations/products/astrophysics-for-people-in-a-hurry View
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How many ways are there to prove the Pythagorean theorem? - Betty Fei

1,540 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-many-ways-are-there-to-prove-the-pythagorean-theorem-betty-fei What do Euclid, 12-year-old Einstein, and American President James Garfield have in c
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Is it possible to create a perfect vacuum? - Rolf Landua and Anais Rassat

709 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/is-it-possible-to-create-a-perfect-vacuum-rolf-landua-and-anais-rassat The universe is bustling with matter and energy. Even in the vast, apparent empti
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Where do new words come from? - Marcel Danesi

747 views / 0 likes - added 6 years ago

Check out the Mysteries of Vernacular series: https://ed.ted.com/mysteries-of-vernacular View full lesson: https://ed.ted.com/lessons/where-do-new-words-come-from-marcel-danesi There are over 170,000 words currently in use in the English language. Yet eve
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The life cycle of a t-shirt - Angel Chang

942 views / 3 likes - added 6 years ago

Learn more about TED-Ed Clubs here: https://ed.ted.com/clubs View full lesson: https://ed.ted.com/lessons/the-life-cycle-of-a-t-shirt-angel-chang Consider the classic white t-shirt. Annually, we sell and buy 2 billion t-shirts globally, making it one of t
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05:44 Popular
The science of smog - Kim Preshoff

858 views / 1 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-science-of-smog-kim-preshoff On July 26, 1943, Los Angeles was blanketed by a thick gas that stung people’s eyes and blocked out the Sun. Panicked r
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The amazing ways plants defend themselves - Valentin Hammoudi

773 views / 1 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-amazing-ways-plants-defend-themselves-valentin-hammoudi Plants are constantly under attack. They face threats ranging from microscopic fungi to smal
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How does impeachment work? - Alex Gendler

743 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-does-impeachment-work-alex-gendler For most jobs, it’s understood that you can be fired – whether for crime, incompetence, or just poor performance.
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Cell membranes are way more complicated than you think - Nazzy Pakpour

1,386 views / 1 likes - added 6 years ago

Check out TED-Ed's Tumblr: http://teded.tumblr.com/ View full lesson: https://ed.ted.com/lessons/cell-membranes-are-way-more-complicated-than-you-think-nazzy-pakpour Cell membranes are structures of contradictions. These oily films are hundreds of times t
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Could we create dark matter? - Rolf Landua

691 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/could-we-create-dark-matter-rolf-landua Eighty-five percent of the matter in our universe is dark matter. We don’t know what dark matter is made of, and
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The rise and fall of the Berlin Wall - Konrad H. Jarausch

656 views / 0 likes - added 6 years ago

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-rise-and-fall-of-the-berlin-wall-konrad-h-jarausch On August 13, 1961, construction workers began tearing up streets and erecting barriers in Berlin
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When is water safe to drink? - Mia Nacamulli

1,364 views / 2 likes - added 6 years ago

View full lesson: https://ed.ted.com/lessons/when-is-water-safe-to-drink-mia-nacamulli Water is refreshing, hydrating, and invaluable to your survival. But clean water remains a precious and often scarce commodity – there are nearly 800 million people who
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04:28 Popular
Will the ocean ever run out of fish? - Ayana Elizabeth Johnson and Jennifer Jacquet

741 views / 1 likes - added 6 years ago

View full lesson: https://ed.ted.com/lessons/will-the-ocean-ever-run-out-of-fish-ayana-elizabeth-johnson-and-jennifer-jacquet When most people think of fishing, we imagine relaxing in a boat and patiently reeling in the day’s catch. But modern industrial
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05:38
Will we ever be able to teleport? - Sajan Saini

651 views / 0 likes - added 6 years ago

View full lesson: https://ed.ted.com/lessons/will-we-ever-be-able-to-teleport-sajan-saini Is teleportation possible? Could a baseball transform into something like a radio wave, travel through buildings, bounce around corners, and change back into a baseb
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06:16
What happens when you have a concussion? - Clifford Robbins

651 views / 1 likes - added 6 years ago

View full lesson: https://ed.ted.com/lessons/what-happens-when-you-have-a-concussion-clifford-robbins Each year in the United States, players of sports and recreational activities receive between 2.5 and 4 million concussions. How dangerous are all those
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04:12 Popular
The left brain vs. right brain myth - Elizabeth Waters

1,119 views / 2 likes - added 6 years ago

View full lesson: https://ed.ted.com/lessons/the-left-brain-vs-right-brain-myth-elizabeth-waters The human brain is visibly split into a left and right side. This structure has inspired one of the most pervasive ideas about the brain: that the left side c
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Can you find the next number in this sequence? - Alex Gendler

2,286 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/can-you-find-the-next-number-in-this-sequence-alex-gendler 1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? Alex Gendler reveals the answer and
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How does caffeine keep us awake? - Hanan Qasim

637 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-does-caffeine-keep-us-awake-hanan-qasim Over 100,000 metric tons of caffeine are consumed around the world every year. That’s equivalent to the weight of 14 Eiffel Towers! Caffeine helps us feel alert, focus
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06:04 $How does fracking work? - Mia Nacamulli$
How does fracking work? - Mia Nacamulli

658 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-does-fracking-work-mia-nacamulli Deep underground lie stores of once-inaccessible natural gas. There’s a technology, called hydraulic fracturing, or “fracking,” that can extract this natural gas, potentially
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What causes kidney stones? - Arash Shadman

1,355 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/what-causes-kidney-stones-arash-shadman The biggest kidney stone on record weighed more than a kilogram and was 17 centimeters in diameter. The patient didn’t actually swallow a stone the size of a coconut; kidn
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How to spot a misleading graph - Lea Gaslowitz

836 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-to-spot-a-misleading-graph-lea-gaslowitz When they’re used well, graphs can help us intuitively grasp complex data. But as visual software has enabled more usage of graphs throughout all media, it has also m
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How do drugs affect the brain? - Sara Garofalo

1,668 views / 2 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-do-drugs-affect-the-brain-sara-garofalo Most people will take a pill, receive an injection, or otherwise take some kind of medicine during their lives. But most of us don’t know anything about how thes
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Can you solve the fish riddle? - Steve Wyborney

1,353 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-fish-riddle-steve-wyborney As the cargo director on the maiden voyage of the S.S. Buoyant, you’ve agreed to transport several tanks containing the last specimens of an endangered fish species t
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05:07
Who built Great Zimbabwe? And why? - Breeanna Elliott

661 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/who-built-great-zimbabwe-and-why-breeanna-elliott Stretched across a tree-peppered expanse in Southern Africa lies the ruins of Great Zimbabwe, a medieval stone city of astounding wealth. Located in the present-
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How to squeeze electricity out of crystals - Ashwini Bharathula

1,119 views / 2 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-to-squeeze-electricity-out-of-crystals-ashwini-bharathula It might sound like science fiction, but if you press on a crystal of sugar, it will actually generate its own electricity. This simple crystal can a
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05:30
The philosophy of Stoicism - Massimo Pigliucci

538 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-philosophy-of-stoicism-massimo-pigliucci What is the best life we can live? How can we cope with whatever the universe throws at us and keep thriving nonetheless? The ancient Greco-Roman philosophy of Stoici
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What can you learn from ancient skeletons? - Farnaz Khatibi

1,091 views / 2 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/what-can-you-learn-from-ancient-skeletons-farnaz-khatibi Ancient skeletons can tell us a great deal about the past, including the age, gender and even the social status of its former owner. But how can we know a
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The power of creative constraints - Brandon Rodriguez

2,051 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-power-of-creative-constraints-brandon-rodriguez Imagine you were asked to invent something new. It could be whatever you want, made from anything you choose, in any shape or size. That kind of creative freed
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The genius of Marie Curie - Shohini Ghose

1,000 views / 7 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-genius-of-marie-curie-shohini-ghose Marie Skłodowska Curie’s revolutionary research laid the groundwork for our understanding of physics and chemistry, blazing trails in oncology, technology, medicine, and n
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The ferocious predatory dinosaurs of Cretaceous Sahara - Nizar Ibrahim

600 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-ferocious-predatory-dinosaurs-of-cretaceous-sahara-nizar-ibrahim In Cretaceous times (around 100 million years ago), North Africa was home to a huge river system and a bizarre menagerie of giant prehistoric
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Why don't perpetual motion machines ever work? - Netta Schramm

776 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/why-don-t-perpetual-motion-machines-ever-work-netta-schramm Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors’ imaginations becau
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History’s deadliest colors - J. V. Maranto

715 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/history-s-deadliest-colors-j-v-maranto When radium was first discovered, its luminous green color inspired people to add it into beauty products and jewelry. It wasn’t until much later that we realized that radi
04:47
How does money laundering work? - Delena D. Spann

683 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-does-money-laundering-work-delena-d-spann Money laundering is the term for any process that “cleans” illegally obtained funds of their “dirty” criminal origins, allowing them to be used within the legal econ
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The world’s most mysterious book - Stephen Bax

536 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-world-s-most-mysterious-book-stephen-bax Deep inside Yale's Beinecke Rare Book and Manuscript Library lies a 240 page tome. Recently carbon dated to around 1420, its pages feature looping handwriting and han
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How does your body process medicine? - Céline Valéry

813 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-does-your-body-process-medicine-celine-valery Have you ever wondered what happens to a painkiller, like ibuprofen, after you swallow it? Medicine that slides down your throat can help treat a headache, a sor
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04:58 Popular
The history of tea - Shunan Teng

976 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-history-of-tea-shunan-teng Tea is the second most consumed beverage in the world after water –– and from sugary Turkish Rize tea to salty Tibetan butter tea, there are almost as many ways of preparing the be
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How the popsicle was invented | Moments of Vision 11 - Jessica Oreck

1,282 views / 2 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-the-popsicle-was-invented-moments-of-vision-11-jessica-oreck Each year, approximately 2 billion popsicles are sold worldwide. But where did the idea for this tasty treat come from? In the eleventh installmen
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How does asthma work? - Christopher E. Gaw

1,725 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-does-asthma-work-christopher-e-gaw More than 300 million people around the world suffer from asthma, and around 250,000 people die from it each year. But why do people get asthma, and how can this disease be
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What is entropy? - Jeff Phillips

1,563 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/what-is-entropy-jeff-phillips There’s a concept that’s crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads in coffee, why air
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What are the challenges of nuclear power? - M. V. Ramana and Sajan Saini

958 views / 1 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/what-are-the-challenges-of-nuclear-power-m-v-ramana-and-sajan-saini Our ability to mine great amounts of energy from uranium nuclei has led some to bill nuclear power as a plentiful, utopian source of electricit
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Check your intuition: The birthday problem - David Knuffke

885 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/check-your-intuition-the-birthday-problem-david-knuffke Imagine a group of people. How big do you think the group would have to be before there’s more than a 50% chance that two people in the group have the same
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Can you solve the pirate riddle? - Alex Gendler

1,808 views / 3 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-pirate-riddle-alex-gendler It’s a good day to be a pirate. Amaro and his four mateys – Bart, Charlotte, Daniel, and Eliza have struck gold – a chest with 100 coins. But now, they must divvy up
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Why are sloths so slow? - Kenny Coogan

889 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-are-sloths-so-slow-kenny-coogan Sloths spend most of their time eating, resting, or sleeping; in fact, they descend from their treetops canopies just once a week, for a bathroom break. How are these creature
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How did Dracula become the world's most famous vampire? - Stanley Stepanic

829 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-did-dracula-become-the-world-s-most-famous-vampire-stanley-stepanic Over a hundred years after his creator was laid to rest, Dracula lives on as the most famous vampire in history. But this Transylvanian nob
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The three different ways mammals give birth - Kate Slabosky

715 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-three-different-ways-mammals-give-birth-kate-slabosky All mammals share certain characteristics, like warm blood and backbones. But despite their similarities, these creatures also have many biological diffe
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Secrets of the X chromosome - Robin Ball

841 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/secrets-of-the-x-chromosome-robin-ball The sequence of DNA that we inherit from our parents encodes directions for making our cells and giving us specific traits. Identical twins have the same DNA sequence, so h
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Oxygen’s surprisingly complex journey through your body - Enda Butler

1,447 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/oxygen-s-surprisingly-complex-journey-through-your-body-enda-butler Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases ca
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04:44 Popular
Why do we itch? - Emma Bryce

1,008 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-we-itch-emma-bryce The average person experiences dozens of individual itches each day. We’ve all experienced the annoyance of an inconvenient itch — but have you ever pondered why we itch in the first pl
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04:47
How do focus groups work? - Hector Lanz

573 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-focus-groups-work-hector-lanz Focus groups have been widely used by organizations and individuals to find out how their products and ideas will be received by an audience. From the usage of household prod
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How blue jeans were invented | Moments of Vision 10 - Jessica Oreck

882 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-blue-jeans-were-invented-moments-of-vision-10-jessica-oreck Today, 96% of American consumers own at least one pair of jeans. But where did these durable duds come from? And how did they get so popular? Jessi
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04:57 Popular
Why do animals have such different lifespans? - Joao Pedro de Magalhaes

1,377 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-animals-have-such-different-lifespans-joao-pedro-de-magalhaes For the microscopic lab worm C. elegans, life equates to just a few short weeks on Earth. The bowhead whale, on the other hand, can live over
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Jellyfish predate dinosaurs. How have they survived so long? - David Gruber

1,252 views / 5 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/jellyfish-predate-dinosaurs-how-have-they-survived-so-long-david-gruber Some are longer than a blue whale. Others are barely larger than a grain of sand. One species unleashes one of the most deadly venoms on ea
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How Magellan circumnavigated the globe - Ewandro Magalhaes

812 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-magellan-circumnavigated-the-globe-ewandro-magalhaes On September 6, 1522, the "Victoria" sailed into harbor in southern Spain. The battered vessel and its 18 sailors were all that remained of a fleet that h
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05:13 Popular
Can you solve the virus riddle? - Lisa Winer

1,424 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-virus-riddle-lisa-winer Your research team has found a prehistoric virus preserved in the permafrost and isolated it for study. After a late night working, you’re just closing up the lab when a
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Why do people get so anxious about math? - Orly Rubinsten

1,500 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-people-get-so-anxious-about-math-orly-rubinsten Have you ever sat down to take a math test and immediately felt your heart beat faster and your palms start to sweat? This is called math anxiety, and if it
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05:10 Popular
How the food you eat affects your gut - Shilpa Ravella

869 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-food-you-eat-affects-your-gut-shilpa-ravella The bacteria in our guts can break down food the body can’t digest, produce important nutrients, regulate the immune system, and protect against harmful germs
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Meet the tardigrade, the toughest animal on Earth - Thomas Boothby

1,008 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/meet-the-tardigrade-the-toughest-animal-on-earth-thomas-boothby Without water, a human can only survive for about 100 hours. But there’s a creature so resilient that it can go without it for decades. This
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05:20 Popular
What makes a poem … a poem? - Melissa Kovacs

775 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-makes-a-poem-a-poem-melissa-kovacs What exactly makes a poem … a poem? Poets themselves have struggled with this question, often using metaphors to approximate a definition. Is a poem a little machine? A fi
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The history of chocolate - Deanna Pucciarelli

1,079 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-history-of-chocolate-deanna-pucciarelli If you can’t imagine life without chocolate, you’re lucky you weren’t born before the 16th century. Until then, chocolate only existed as a bitter, foamy drink in Meso
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What is McCarthyism? And how did it happen? - Ellen Schrecker

596 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-is-mccarthyism-and-how-did-it-happen-ellen-schrecker In the 1950s, as part of a campaign to expose suspected Communists, thousands of individuals were aggressively investigated and questioned before governm
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The myth of Icarus and Daedalus - Amy Adkins

957 views / 0 likes - added 7 years ago

View full lesson: ed.ted.com/lessons/the-myth-of-icarus-and-daedalus-amy-adkins In mythological ancient Greece, Icarus flew above Crete on wings made from wax and feathers, defying the laws of man and nature. To witnesses on the ground, he looked like a g
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Where do superstitions come from? - Stuart Vyse

864 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/where-do-superstitions-come-from-stuart-vyse Are you afraid of black cats? Would you open an umbrella indoors? How do you feel about the number 13? Whether or not you believe in them, you’re probably familiar wi
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How Braille was invented | Moments of Vision 9 - Jessica Oreck

1,496 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-braille-was-invented-moments-of-vision-9-jessica-oreck Today, Braille is the universally accepted system of writing for the blind, translated into almost every language in almost every country across the glo
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Does "The Wonderful Wizard of Oz" have a hidden message? - David B. Parker

805 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/does-the-wonderful-wizard-of-oz-have-a-hidden-message-david-b-parker In his introduction to “The Wonderful Wizard of Oz,” L. Frank Baum claims that the book is simply an innocent children’s story. But some schol
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What happened to trial by jury? - Suja A. Thomas

597 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-happened-to-trial-by-jury-suja-a-thomas In the United States today, juries decide less than 4% of criminal cases and less than 1% of civil cases filed in court. At the same time, jury systems in other count
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Everything you need to know to read "Frankenstein" - Iseult Gillespie

655 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/everything-you-need-to-know-to-read-mary-shelley-s-frankenstein-iseult-gillespie In 1815, Lord Byron proposed a challenge to a few literary guests he had gathered in his house on Lake Geneva: Who could write the
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Are ghost ships real? - Peter B. Campbell

759 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/are-ghost-ships-real-peter-b-campbell In 1884, the British steamer “Rumney” crashed into the French ship “Frigorifique.” Seeing their ship filling with water, the French crew climbed aboard the “Rumney.” But as
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How to practice effectively...for just about anything - Annie Bosler and Don Greene

712 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-practice-effectively-for-just-about-anything-annie-bosler-and-don-greene Mastering any physical skill takes practice. Practice is the repetition of an action with the goal of improvement, and it helps us
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Can you solve the three gods riddle? - Alex Gendler

1,282 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-three-gods-riddle-alex-gendler You and your team have crash-landed on an ancient planet. Can you appease the three alien overlords who rule it and get your team safely home? Created by logician
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The exceptional life of Benjamin Banneker - Rose-Margaret Ekeng-Itua

926 views / 9 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-exceptional-life-of-benjamin-banneker-rose-margaret-ekeng-itua Born in 1731 to freed slaves on a farm in Baltimore, Benjamin Banneker was obsessed with math and science. And his appetite for knowledge only g
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What happens during a heart attack? - Krishna Sudhir

1,628 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-happens-during-a-heart-attack-krishna-sudhir Approximately seven million people around the world die from heart attacks every year. And cardiovascular disease, which causes heart attacks and other problems
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How small are we in the scale of the universe? - Alex Hofeldt

792 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-small-are-we-in-the-scale-of-the-universe-alex-hofeldt In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavor wa
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What is bipolar disorder? - Helen M. Farrell

631 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-is-bipolar-disorder-helen-m-farrell The word bipolar means ‘two extremes.’ For the many millions experiencing bipolar disorder around the world, life is split between two different realities: elation and de
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Would winning the lottery make you happier? - Raj Raghunathan

938 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/would-winning-the-lottery-make-you-happier-raj-raghunathan Imagine winning a multi-million dollar lottery tomorrow. If you’re like many of us, you’d be ecstatic, unable to believe your good luck. But
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How super glue was invented | Moments of Vision 8 - Jessica Oreck

793 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-super-glue-was-invented-moments-of-vision-8-jessica-oreck Today, super glue is a nearly indispensable household item — but its incredibly sticky nature almost caused it to be abandoned in the development pha
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History vs. Cleopatra - Alex Gendler

1,402 views / 7 likes - added 7 years ago

View full lesson: ed.ted.com/lessons/history-vs-cleopatra-alex-gendler She was the most notorious woman in ancient history, a queen who enraptured not one but two of Rome’s greatest generals. But was she just a skilled seductress – or a great ruler in her
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Everything you need to know to read Homer's "Odyssey" - Jill Dash

772 views / 0 likes - added 7 years ago

View full lesson: ed.ted.com/lessons/everything-you-need-to-know-to-read-homer-s-odyssey-jill-dash An encounter with a man-eating giant. A sorceress who turns men into pigs. A long-lost king taking back his throne. On their own, any of these make great st
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The myth behind the Chinese zodiac - Megan Campisi and Pen-Pen Chen

1,017 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-myth-behind-the-chinese-zodiac-megan-campisi-and-pen-pen-chen What’s your sign? In Western astrology, it’s a constellation determined by when your birthday falls in the calendar. But according to the Chinese
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Mary's room: A philosophical thought experiment - Eleanor Nelsen

766 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/mary-s-room-a-philosophical-thought-experiment-eleanor-nelsen Imagine a neuroscientist who has only ever seen black and white things, but she is an expert in color vision and knows everything about its physics a
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The mathematics of sidewalk illusions - Fumiko Futamura

796 views / 0 likes - added 7 years ago

View full lesson here: http://ed.ted.com/lessons/the-mathematics-of-sidewalk-illusions-fumiko-futamura Have you ever come across an oddly stretched image on the sidewalk, only to find that it looks remarkably realistic if you stand in exactly the right sp
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A brief history of numerical systems - Alessandra King

1,530 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/a-brief-history-of-numerical-systems-alessandra-king 1, 2, 3, 4, 5, 6, 7, 8, 9... and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of the
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How do animals experience pain? - Robyn J. Crook

1,305 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-animals-experience-pain-robyn-j-crook Humans know the surprising prick of a needle, the searing pain of a stubbed toe, and the throbbing of a toothache. We can identify many types of pain and have multipl
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Would you sacrifice one person to save five? - Eleanor Nelsen

690 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/would-you-sacrifice-one-person-to-save-five-eleanor-nelsen Imagine you’re watching a runaway trolley barreling down the tracks, straight towards five workers. You happen to be standing next to a switch that will
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What happens to our bodies after we die? - Farnaz Khatibi Jafari

672 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-happens-to-our-bodies-after-we-die-farnaz-khatibi-jafari Since the dawn of humanity, an estimated 100.8 billion people have lived and died, a number that increases by about 0.8% of the world’s population ea
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How to master your sense of smell - Alexandra Horowitz

804 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-master-your-sense-of-smell-alexandra-horowitz Some perfumers can distinguish individual odors in a fragrance made of hundreds of scents; tea-experts have been known to sniff out the exact location of a pa
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What’s so great about the Great Lakes? - Cheri Dobbs and Jennifer Gabrys

857 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-s-so-great-about-the-great-lakes-cheri-dobbs-and-jennifer-gabrys The North American Great Lakes — Huron, Ontario, Michigan, Erie, and Superior — are so big that they border 8 states and contain 23 quadrilli
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What does this symbol actually mean? - Adrian Treharne

1,243 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-does-this-symbol-actually-mean-adrian-treharne Some of the world’s most recognizable symbols exist to sell products. Others, to steer traffic or advance political causes. But there’s one whose main purpose
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Can you solve the counterfeit coin riddle? - Jennifer Lu

919 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-counterfeit-coin-riddle-jennifer-lu You’re the realm’s greatest mathematician, but ever since you criticized the Emperor’s tax laws, you’ve been locked in the dungeon. Luckily for you, one of t
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Why are we so attached to our things? - Christian Jarrett

768 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-are-we-so-attached-to-our-things-christian-jarrett After witnessing the “violent rage” shown by babies whenever deprived of an item they considered their own, Jean Piaget – a founding father of child psychol
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How the stethoscope was invented | Moments of Vision 7 - Jessica Oreck

683 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-stethoscope-was-invented-moments-of-vision-7-jessica-oreck The stethoscope is the single most widely used medical instrument in the world. But where did the idea come from? In the seventh installment of
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Is there a limit to technological progress? - Clément Vidal

704 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/is-there-a-limit-to-technological-progress-clement-vidal Many generations have felt they’ve reached the pinnacle of technological advancement. Yet, if you look back 100 years, the technologies we take for grante
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Why do airlines sell too many tickets? - Nina Klietsch

649 views / 0 likes - added 7 years ago

View full lesson on ed.ted.com: http://ed.ted.com/lessons/why-do-airlines-sell-too-many-tickets-nina-klietsch Have you ever sat in a doctor’s office for hours, despite having an appointment? Has a hotel turned down your reservation because it’s full? Have
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How high can you count on your fingers?

1,299 views / 0 likes - added 7 years ago

View full lesson: https://ed.ted.com/lessons/how-high-can-you-count-on-your-fingers-spoiler-much-higher-than-10-james-tanton How high can you count on your fingers? It seems like a question with an obvious answer. After all, most of us have ten fingers --
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Why doesn’t anything stick to Teflon? - Ashwini Bharathula

652 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-doesn-t-anything-stick-to-teflon-ashwini-bharathula Teflon was in the spacesuits the Apollo crew wore for the moon landing, in pipes and valves used in the Manhattan project, and it may be in your kitchen, a
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The neuroscience of imagination - Andrey Vyshedskiy

641 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-neuroscience-of-imagination-andrey-vyshedskiy Imagine, for a second, a duck teaching a French class. A ping-pong match in orbit around a black hole. A dolphin balancing a pineapple. You probably haven’
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How does your body know what time it is? - Marco A. Sotomayor

811 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-does-your-body-know-what-time-it-is-marco-a-sotomayor Being able to sense time helps us do everything from waking and sleeping to knowing precisely when to catch a ball that’s hurtling towards us. And we owe
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How smudge-proof lipstick was invented | Moments of Vision 6 - Jessica Oreck

841 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-smudge-proof-lipstick-was-invented-moments-of-vision-6-jessica-oreck Today, lip cosmetics are a billion dollar industry, with 1 out of every 3 women claiming that they won’t leave home without applying lipst
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Is there a reproducibility crisis in science? - Matt Anticole

483 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/is-there-a-reproducibility-crisis-in-science-matt-anticole Published scientific studies can motivate research, inspire products, and inform policy. However, recent studies that examined dozens of published pharm
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Can you solve the airplane riddle? - Judd A. Schorr

1,151 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-airplane-riddle-judd-a-schorr Professor Fukanō, the famous scientist, has embarked on a new challenge – piloting around the world in a plane of his own design. There’s just one problem: there's
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What's the fastest way to alphabetize your bookshelf? - Chand John

801 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-s-the-fastest-way-to-alphabetize-your-bookshelf-chand-john You work at the college library. You’re in the middle of a quiet afternoon when suddenly, a shipment of 1,280 books arrives. The books are in a str
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Can machines read your emotions? - Kostas Karpouzis

849 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-machines-read-your-emotions-kostas-karpouzis Computers can beat us in board games, transcribe speech, and instantly identify almost any object. But will future robots go further by learning to figure out wha
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Why is Vermeer's "Girl with the Pearl Earring" considered a masterpiece? - James Earle

903 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-is-vermeer-s-girl-with-the-pearl-earring-considered-a-masterpiece-james-earle Is she turning towards you or away from you? No one can agree. She’s the subject of Dutch Master Johannes Vermeer’s "Girl with th
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The secrets of Mozart’s “Magic Flute” - Joshua Borths

803 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-secrets-of-mozart-s-magic-flute-joshua-borths Wolfgang Amadeus Mozart’s “Die Zauberflöte” (“The Magic Flute”) is widely regarded as one of the most influential operas in history. And while it may seem like a
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Why do we feel nostalgia? - Clay Routledge

508 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-we-feel-nostalgia-clay-routledge Nostalgia was once considered an illness confined to specific groups of people. Today, people all over the world report experiencing and enjoying nostalgia. But how does n
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How do US Supreme Court justices get appointed? - Peter Paccone

520 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-us-supreme-court-justices-get-appointed-peter-paccone There’s a job out there with a great deal of power, pay, prestige, and near-perfect job-security. And there’s only one way to be hired: get appointed
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How to recognize a dystopia - Alex Gendler

781 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-recognize-a-dystopia-alex-gendler The genre of dystopia – the ‘not good place’– has captured the imaginations of artists and audiences alike for centuries. But why do we bother with all this pessimism? Al
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Do we really need pesticides? - Fernan Pérez-Gálvez

1,346 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/do-we-really-need-pesticides-fernan-perez-galvez Annually, we shower over 5 billion pounds of pesticides across the Earth to control insects, unwanted weeds, funguses, rodents, and bacteria that may threaten our
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How do whales sing? - Stephanie Sardelis

978 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-whales-sing-stephanie-sardelis Communicating underwater is challenging. Light and odors don’t travel well, but sound moves about four times faster in water than in air — which means marine mammals often u
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Are preservatives bad for you?

2,032 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/are-preservatives-bad-for-you-eleanor-nelsen Food doesn’t last. In days, sometimes hours, bread goes moldy, apple slices turn brown, and bacteria multiply in mayonnaise. But you can find all of these foods out o
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Why are sharks so awesome?

1,806 views / 12 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-are-sharks-so-awesome-tierney-thys Sharks have been celebrated as powerful gods by some native cultures. And today, sharks are recognized as apex predators of the world’s ocean. What is it that makes these f
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You are your microbes - Jessica Green and Karen Guillemin

1,328 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/you-are-your-microbes-jessica-green-and-karen-guillemin From the microbes in our stomachs to the ones on our teeth, we are homes to millions of unique and diverse communities which help our bodies function. Jess
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How the sandwich was invented | Moments of Vision 5 - Jessica Oreck

871 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-sandwich-was-invented-moments-of-vision-5-jessica-oreck Today, it is estimated that 50% of Americans eat at least one sandwich every day. And while it’s all but impossible to imagine a world without them
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The Egyptian Book of the Dead: A guidebook for the underworld - Tejal Gala

707 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-egyptian-book-of-the-dead-tejal-gala Ancient Egyptians believed that in order to become immortal after death, a spirit must first pass through the underworld — a realm of vast caverns, lakes of fire, and mag
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Can you solve the river crossing riddle? - Lisa Winer

1,804 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-river-crossing-riddle-lisa-winer As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank
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What caused the French Revolution? - Tom Mullaney

867 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-caused-the-french-revolution-tom-mullaney What rights do people have, and where do they come from? Who gets to make decisions for others, and on what authority? And how can we organize society to meet peopl
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Plato’s best (and worst) ideas - Wisecrack

988 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/plato-s-best-and-worst-ideas-wisecrack Check out Wisecrack's YouTube channel here: https://goo.gl/A5vb5K Few individuals have influenced the world and many of today’s thinkers like Plato. He created the first We
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Why should you listen to Vivaldi's "Four Seasons"? - Betsy Schwarm

779 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-should-you-listen-to-vivaldi-s-four-seasons-betsy-schwarm Light, bright, and cheerful, "The Four Seasons" by Antonio Vivaldi is some of the most familiar of all early 18th century music, featured in numerous
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How much of human history is on the bottom of the ocean? - Peter Campbell

1,038 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-much-of-human-history-is-on-the-bottom-of-the-ocean-peter-campbell Sunken relics, ghostly shipwrecks, and lost cities aren’t just wonders found in fictional adventures. Beneath the ocean’s surface, there are
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What causes cavities? - Mel Rosenberg

1,326 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-causes-cavities-mel-rosenberg When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with ho
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Can you solve the prisoner boxes riddle? - Yossi Elran

1,069 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-prisoner-boxes-riddle-yossi-elran Your favorite band is great at playing music...but not so great at being organized. They keep misplacing their instruments on tour, and it’s driving their mana
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Is it bad to hold your pee? - Heba Shaheed

865 views / 4 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/is-it-bad-to-hold-your-pee-heba-shaheed Humans should urinate at least four to six times a day, but occasionally, the pressures of modern life force us to clench and hold it in. How bad is this habit, and how lo
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How the rubber glove was invented | Moments of Vision 4 - Jessica Oreck

998 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-rubber-glove-was-invented-moments-of-vision-4-jessica-oreck It’s hard to imagine a modern hospital being able to function without rubber gloves — but they weren’t actually invented until 1890. In the fou
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04:56 Popular
Could we survive prolonged space travel?

741 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/could-we-survive-prolonged-space-travel-lisa-nip Prolonged space travel plays a severe toll on the human body: microgravity impairs muscle and bone growth, and high doses of radiation cause irreversible mutation
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How does the Nobel Peace Prize work? - Adeline Cuvelier and Toril Rokseth

536 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-does-the-nobel-peace-prize-work-adeline-cuvelier-and-toril-rokseth Among the top prestigious awards in the world, the Nobel Peace Prize has honored some of the most celebrated and revered international figur
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The history of the Cuban Missile Crisis - Matthew A. Jordan

833 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-history-of-the-cuban-missile-crisis-matthew-a-jordan Imagine going about your life knowing that, at any given moment, you and everyone you know could be wiped out without warning at the push of a button. Thi
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Could human civilization spread across the whole galaxy? - Roey Tzezana

806 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/could-human-civilization-spread-across-the-whole-galaxy-roey-tzezana Could human civilization eventually spread across the whole Milky Way galaxy? Could we move beyond our small, blue planet to establish colonie
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Why are there so many types of apples? - Theresa Doud

837 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-are-there-so-many-types-of-apples-theresa-doud Have you ever walked into a grocery store and wondered where all the varieties of apples came from? You might find SnapDragon, Pixie Crunch, Cosmic Crisp, Jazz,
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How to use rhetoric to get what you want - Camille A. Langston

663 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-use-rhetoric-to-get-what-you-want-camille-a-langston How do you get what you want, using just your words? Aristotle set out to answer exactly that question over two thousand years ago with a treatise on r
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Aphasia: The disorder that makes you lose your words - Susan Wortman-Jutt

713 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/aphasia-the-disorder-that-makes-you-lose-your-words-susan-wortman-jutt Language is an essential part of our lives that we often take for granted. But, if the delicate web of language networks in your brain becam
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What is a vector? - David Huynh

1,800 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-is-a-vector-david-huynh Physicists, air traffic controllers, and video game creators all have at least one thing in common: vectors. But what exactly are they, and why do they matter? David Huynh explains h
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How the Band-Aid was invented | Moments of Vision 3 - Jessica Oreck

1,210 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-band-aid-was-invented-moments-of-vision-3-jessica-oreck It is estimated that Johnson & Johnson have made an astounding 100 billion Band-Aids since they were invented in 1920. But where did the idea come
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04:23 Popular
How do animals see in the dark?

765 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-animals-see-in-the-dark-anna-stockl To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other hand, experience a rich and varied world, bursting with details, sh
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A brief history of graffiti - Kelly Wall

1,155 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/a-brief-history-of-graffiti-kelly-wall Spray-painted subway cars, tagged bridges, mural-covered walls – graffiti pops up boldly throughout our cities. And it turns out: it’s nothing new. Graffiti has been around
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One of the most difficult words to translate... - Krystian Aparta

1,115 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/one-of-the-most-difficult-words-to-translate-krystian-aparta As simple as it seems, it’s often impossible to accurately translate the word you without knowing a lot more about the situation where it’s being said
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How The Königsberg Bridge Problem Changed Mathematics - Dan Van Der Vieren

824 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-konigsberg-bridge-problem-changed-mathematics-dan-van-der-vieren You’d have a hard time finding the medieval city Königsberg on any modern maps, but one particular quirk in its geography has made it one
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The Paradox Of Value - Akshita Agarwal

881 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-paradox-of-value-akshita-agarwal Imagine you’re on a game show and you can choose between two prizes: a diamond … or a bottle of water. It’s an easy choice – the diamonds are more valuable. But if given the
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04:33 Popular
How Smart Are Orangutans? - Lu Gao

720 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-smart-are-orangutans-lu-gao Along with humans, orangutans belong to the Hominidae family tree, which stretches back 14 million years. But it’s not just their striking red hair that makes orangutans unique am
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How Do Animals See In The Dark? - Anna Stöckl

865 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-animals-see-in-the-dark-anna-stockl To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other hand, experience a rich and varied world, bursting with details, sh
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Are Spotty Fruits And Vegetables Safe To Eat? - Elizabeth Brauer

889 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/are-spotty-fruits-and-vegetables-safe-to-eat-elizabeth-brauer In 2010, 30 billion dollars worth of fruits and vegetables were wasted by American retailers and shoppers, in part because of cosmetic problems and p
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What Is The Biggest Single-celled Organism? - Murry Gans

1,813 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-is-the-biggest-single-celled-organism-murry-gans The elephant is a creature of epic proportions — and yet, it owes its enormity to more than 1,000 trillion microscopic cells. And on the epically small end o
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How To Visualize One Part Per Million

894 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-visualize-one-part-per-million-kim-preshoff-the-ted-ed-community “Parts per million” is a scientific unit of measurement that counts the number of units of one substance per one million units of another.
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How A Single-celled Organism Almost Wiped Out Life On Earth - Anusuya Willis

1,884 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-a-single-celled-organism-almost-wiped-out-life-on-earth-anusuya-willis There’s an organism that changed the world. It caused the first mass extinction in Earth’s history … and also paved the way for complex
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How Coffee Got Quicker | Moments Of Vision 2 - Jessica Oreck

693 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-coffee-got-quicker-moments-of-vision-2-jessica-oreck For the 64% of Americans that drink coffee daily, an expedient cup is practically essential. But preparing coffee hasn’t always been easy. In the second i
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Real Life Sunken Cities - Peter Campbell

815 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/real-life-sunken-cities-peter-campbell Though people are most familiar with Plato’s fictional Atlantis, many real underwater cities actually exist. Peter Campbell explains how sunken cities are studied by scient
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Which Sunscreen Should You Choose? - Mary Poffenroth

831 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/which-sunscreen-should-you-choose-mary-poffenroth Sunscreen comes in many forms, each with its own impacts on your body and the environment. With so many options, how do you choose which sunscreen is best for yo
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Why Do We Hiccup? - John Cameron

1,130 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-we-hiccup-john-cameron The longest recorded case of hiccups lasted for 68 years … and was caused by a falling hog. While that level of severity is extremely uncommon, most of us are no stranger to an occa
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04:36 Popular
Should We Be Looking For Life Elsewhere In The Universe? - Aomawa Shields

924 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/should-we-be-looking-for-life-elsewhere-in-the-universe-aomawa-shields As the number of “potentially habitable” planets that astronomers find continues to rise, we seem ever closer to answering the question, “Ar
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Why The Metric System Matters - Matt Anticole

1,575 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-the-metric-system-matters-matt-anticole For the majority of recorded human history, units like the weight of a grain or the length of a hand weren’t exact and varied from place to place. Now, consistent meas
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05:37 Popular
How Did Hitler Rise To Power? - Alex Gendler And Anthony Hazard

1,068 views / 4 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-did-hitler-rise-to-power-alex-gendler-and-anthony-hazard Decades after the fall of the Third Reich, it feels impossible to understand how Adolf Hitler, the tyrant who orchestrated one of the largest genocide
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How To Turn Protest Into Powerful Change - Eric Liu

633 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-to-turn-protest-into-powerful-change-eric-liu We live in an age of protest. On campuses, in public squares, on streets and social media, protestors around the world are challenging the status quo. But while
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Rosalind Franklin: DNA's Unsung Hero - Cláudio L. Guerra

1,046 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/rosalind-franklin-dna-s-unsung-hero-claudio-l-guerra The discovery of the structure of DNA was one of the most important scientific achievements in human history. The now-famous double helix is almost synonymous
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Can You Solve The Passcode Riddle? - Ganesh Pai

1,406 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-passcode-riddle-ganesh-pai In a dystopian world, your resistance group is humanity’s last hope. Unfortunately, you’ve all been captured by the tyrannical rulers and brought to the ancient colis
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04:58 Popular
How North America Got Its Shape - Peter J. Haproff

1,014 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-north-america-got-its-shape-peter-j-haproff North America didn’t always have its familiar shape, nor its famed mountains, canyons, and plains: all of that was once contained in an unrecognizable mass, buried
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What Is Obesity? - Mia Nacamulli

862 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-is-obesity-mia-nacamulli Obesity is an escalating global epidemic. It substantially raises the probability of diseases like diabetes, heart disease, stroke, high blood pressure, and cancer. But what is the
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How Playing Sports Benefits Your Body ... And Your Brain - Leah Lagos And Jaspal Ricky Singh

1,788 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-playing-sports-benefits-your-body-and-your-brain-leah-lagos-and-jaspal-ricky-singh Made in partnership with the Always #LikeAGirl campaign. The victory of the underdog. The last minute penalty shot that wins
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05:03
How The Choices You Make Can Affect Your Genes - Carlos Guerrero-Bosagna

526 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-choices-you-make-can-affect-your-genes-carlos-guerrero-bosagna Here’s a conundrum: Identical twins originate from the same DNA ... so how can they turn out so different — even in traits that have a signi
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Is There A Disease That Makes Us Love Cats? - Jaap De Roode

1,284 views / 4 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/is-there-a-disease-that-makes-us-love-cats-jaap-de-roode Today, about a third of the world’s population is infected with a strange disease called toxoplasmosis — and most of them never even know it. And while th
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05:04
What Makes Something

480 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-makes-something-kafkaesque-noah-tavlin The term Kafkaesque has entered the vernacular to describe unnecessarily complicated and frustrating experiences, especially with bureaucracy. But does standing in a l
04:53 Popular
How The Food You Eat Affects Your Brain - Mia Nacamulli

1,053 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-the-food-you-eat-affects-your-brain-mia-nacamulli When it comes to what you bite, chew and swallow, your choices have a direct and long-lasting effect on the most powerful organ in your body: your brain. So
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What Does It Mean To Be A Refugee? - Benedetta Berti And Evelien Borgman

789 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/what-does-it-mean-to-be-a-refugee-benedetta-berti-and-evelien-borgman About 60 million people around the globe have been forced to leave their homes to escape war, violence and persecution. The majority have bec
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Why Wasn’t The Bill Of Rights Originally In The US Constitution? - James Coll

833 views / 4 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-wasn-t-the-bill-of-rights-originally-in-the-us-constitution-james-coll When you think of the US Constitution, what’s the first thing that comes to mind? Free speech? The right to bear arms? These passages ar
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04:18 Popular
The Evolution Of The Book - Julie Dreyfuss

741 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-evolution-of-the-book-julie-dreyfuss What makes a book a book? Is it just anything that stores and communicates information? Or does it have to do with paper, binding, font, ink, its weight in your hands, th
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Why Do Our Bodies Age? - Monica Menesini

708 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-our-bodies-age-monica-menesini Human bodies aren’t built for extreme aging: our capacity is set at about 90 years. But what does aging really mean, and how does it counteract the body’s efforts to stay al
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04:56 Popular
How Interpreters Juggle Two Languages At Once - Ewandro Magalhaes

1,396 views / 0 likes - added 7 years ago

View full Lesson: https://ed.ted.com/lessons/how-interpreters-juggle-two-languages-at-once-ewandro-magalhaes Language is complex, and when abstract or nuanced concepts get lost in translation, the consequences may be catastrophic. Given the complexities o
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How Transistors Work - Gokul J. Krishnan

950 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-transistors-work-gokul-j-krishnan Modern computers are revolutionizing our lives, performing tasks unimaginable only decades ago. This was made possible by a long series of innovations, but there’s one found
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04:47
The Pleasure Of Poetic Pattern - David Silverstein

606 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-pleasure-of-poetic-pattern-david-silverstein Humans are creatures of rhythm and repetition. From our breath to our gait: rhythm is central to our experience, and often brings us pleasure. We can find pleasur
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Can You Solve The Control Room Riddle? - Dennis Shasha

1,064 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-control-room-riddle-dennis-shasha As your country's top spy, you must infiltrate the headquarters of the evil syndicate, find the secret control panel, and deactivate their death ray. But your
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Why Do Some People Have Seasonal Allergies? - Eleanor Nelsen

1,202 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-do-some-people-have-seasonal-allergies-eleanor-nelsen Ah, spring. Grass growing, flowers blooming, trees budding. For those with allergies, though, this explosion of new life probably inspires more dread tha
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The Otherworldly Creatures In The Ocean's Deepest Depths - Lidia Lins

1,060 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-otherworldly-creatures-in-the-ocean-s-deepest-depths-lidia-lins About 60 percent of the ocean is a cold, dark region that spans down to 11,000 meters. This zone is known as the deep ocean, and though it seem
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04:41 Popular
Making Sense Of Irrational Numbers

2,064 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/making-sense-of-irrational-numbers-ganesh-pai Like many heroes of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or dis
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04:36
The Origin Of Countless Conspiracy Theories - PatrickJMT

520 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-origin-of-countless-conspiracy-theories-patrickjmt Check out PatrickJMT's YouTube channel here: https://www.youtube.com/user/patrickJMT Why can we find geometric shapes in the night sky? How can we know that
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The Microbial Jungles All Over The Place (and You) - Scott Chimileski And Roberto Kolter

681 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-microbial-jungles-all-over-the-place-and-you-scott-chimileski-and-roberto-kolter As we walk through our daily environments, we’re surrounded by exotic creatures that are too small to see with the naked eye.
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04:18
Why Is The US Constitution So Hard To Amend? - Peter Paccone

673 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/why-is-the-us-constitution-so-hard-to-amend-peter-paccone When it was ratified in 1789, the US Constitution didn’t just institute a government by the people – it provided a way for the people to alter the Consti
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The Psychology Behind Irrational Decisions - Sara Garofalo

880 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-psychology-behind-irrational-decisions-sara-garofalo Often people make decisions that are not “rational” from a purely economical point of view — meaning that they don’t necessarily lead to the best result.
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How Computer Memory Works - Kanawat Senanan

1,743 views / 3 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-computer-memory-works-kanawat-senanan In many ways, our memories make us who we are, helping us remember our past, learn and retain skills, and plan for the future. And for the computers that often act as ex
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04:25
How Do We Separate The Seemingly Inseparable? - Iddo Magen

667 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/how-do-we-separate-the-inseparable-iddo-magen Your cell phone is mainly made of plastics and metals. It’s easy to appreciate the process by which those elements add up to something so useful. But there’s another
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Who IS Sherlock Holmes? - Neil McCaw

962 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/who-is-sherlock-holmes-neil-mccaw More than a century after first emerging into the fogbound, gaslit streets of Victorian London, Sherlock Holmes is universally recognizable. And yet many of his most recognizabl
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The Threat Of Invasive Species - Jennifer Klos

2,666 views / 0 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/the-threat-of-invasive-species-jennifer-klos Massive vines that blanket the southern United States, climbing high as they uproot trees and swallow buildings. A ravenous snake that is capable of devouring an alli
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04:39 Popular
Can Plants Talk To Each Other? - Richard Karban

1,358 views / 2 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/can-plants-talk-to-each-other-richard-karban Can plants talk to each other? It certainly doesn’t seem that way: They don’t have complex sensory or nervous systems, like animals do, and they look pret
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04:50 Popular
Could Anyone Make A Jackson Pollock Painting? - Sarah Rosenthal

1,019 views / 1 likes - added 7 years ago

View full lesson: http://ed.ted.com/lessons/could-just-anyone-make-a-jackson-pollock-painting-sarah-rosenthal If you visit a museum with a collection of modern and contemporary art, you’re likely to see works that sometimes elicit the response, “My cat co
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04:58 Popular
Why Do Cats Act So Weird? - Tony Buffington

1,682 views / 1 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/why-do-cats-act-so-weird-tony-buffington They’re cute, they’re lovable, and judging by the 26 billion views on over 2 million YouTube videos of them, one thing is certain: cats are very entertaining. But their s
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The Turing Test: Can A Computer Pass For A Human? - Alex Gendler

1,126 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/the-turing-test-can-a-computer-pass-for-a-human-alex-gendler What is consciousness? Can an artificial machine really think? For many, these have been vital considerations for the future of artificial intelligenc
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04:29 Popular
Why Is Being Scared So Fun? - Margee Kerr

717 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/why-do-we-like-to-scare-ourselves-margee-kerr At this very moment, people are lining up somewhere to scare themselves, be it with a thrill-ride or a horror movie. In fact, in October of 2015 alone, about 28 mill
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The Surprising Reason You Feel Awful When You're Sick - Marco A. Sotomayor

896 views / 1 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/the-surprising-reason-you-feel-awful-when-you-re-sick-marco-a-sotomayor It starts with a tickle in your throat that becomes a cough. Your muscles begin to ache, you grow irritable, and you lose your appetite. It
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Should You Trust Unanimous Decisions? - Derek Abbott

861 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/should-you-trust-unanimous-decisions-derek-abbott Imagine a police lineup where ten witnesses are asked to identify a bank robber they glimpsed fleeing the scene. If six of them pick the same person, there’s a g
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04:23 Popular
Why The Insect Brain Is So Incredible - Anna Stöckl

1,129 views / 2 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/why-the-insect-brain-is-so-incredible-anna-stockl The human brain is one of the most sophisticated organs in the world, a supercomputer made of billions of neurons that control all of our senses, thoughts, and a
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04:39 Popular
Does Grammar Matter? - Andreea S. Calude

915 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/does-grammar-matter-andreea-s-calude It can be hard sometimes, when speaking, to remember all of the grammatical rules that guide us when we’re writing. When is it right to say “the dog and me” and when should i
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04:34 Popular
Do Fad Diets Work? - Mia Nacamulli

1,408 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/do-fad-diets-work-mia-nacamulli Conventional wisdom about diets, including government health recommendations, seems to change all the time. And yet ads routinely come out claiming to have THE answer about what w
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04:53 Popular
Why Is Mount Everest So Tall? - Michele Koppes

1,388 views / 6 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/why-is-mount-everest-so-tall-michele-koppes At 8,850 meters above sea level, Qomolangma, also known as Mount Everest, has the highest altitude on the planet. But how did this towering formation get so tall? Mich
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