Search Results: "oak academy national"

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01:32 Popular
Using Live Oak Trees As A Blueprint For Surviving Hurricanes | Think Like A Tree

994 views / 3 likes - added 8 years ago

With sturdy, spiral trunks and deep roots that intertwine with neighboring trees, a live oak is a force to be reckoned with. Find out how architects and engineers are starting to think like a tree when designing safe and resilient structures. SUBSCRIBE fo
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04:23 Popular
A Brief History of Yellowstone National Park | National Geographic

859 views / 2 likes - added 4 years ago

Yellowstone National Park is epic, beautiful, and iconic. Find out how it became America's first national park. Subscribe: http://bit.ly/NatGeoSubscribe#NationalGeographic #Yellowstone #YellowstoneLiveAbout Yellowstone Live:Witness Yellowstone like you've
05:50 Popular
360° Underwater National Park | National Geographic

1,253 views / 5 likes - added 7 years ago

Plunge into a Caribbean gem with National Geographic photographer Brian Skerry to explore the Buck Island Reef – America’s first protected marine monument. Sea of Hope: America's Underwater Treasures airs on Nat Geo Sunday 1/15 at 8/7c: http://bit.ly/NGSe
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04:18
Sesame Street Explores National Parks: Grand Canyon National Park - Seasons

661 views / 2 likes - added 9 years ago

Learn about seasons with Ranger Amala. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation Area. Sub
04:43 Popular
Sesame Street Explores National Parks: Grand Canyon National Park -- Habitats

710 views / 1 likes - added 9 years ago

Learn about habitats with Ranger Amala. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation Area. Su
03:44
Sesame Street Explores National Parks: Gateway National Recreation Area -- Seasons

601 views / 0 likes - added 9 years ago

Learn about migration with Ranger Shalini. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation Area.
03:52
Sesame Street Explores National Parks: Gateway National Recreation Area -- Habitats

560 views / 0 likes - added 9 years ago

Learn about habitats with Ranger Shalini. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation Area.
04:11
Sesame Street Explores National Parks: Gateway National Recreation Area -- Nests

557 views / 1 likes - added 9 years ago

Learn about nests with Ranger Shalini. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation Area. Sub
05:29
Sesame Street Explores National Parks: Grand Canyon National Park -- Families

581 views / 0 likes - added 9 years ago

Learn about animal families with Ranger Amala. Sesame Street Explores National Parks is produced in partnership with the National Park Service and the National Park Foundation. Special thanks to Grand Canyon National Park and Gateway National Recreation A
06:12
The Story of the US National Anthem (and How it Became Part of the National Pastime)

598 views / 0 likes - added 6 years ago

If you happen to like our videos and have a few bucks to spare to support our efforts, check out our Patreon page where we've got a variety of perks for our Patrons, including Simon's voice on your GPS and the ever requested Simon Whistler whistling packa
03:20 Popular
Electromagnetism 101 | National Geographic

1,643 views / 0 likes - added 5 years ago

Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet. ➡ Subscribe
02:14 Popular
Glow Worm Caves of New Zealand in 360° | National Geographic

862 views / 3 likes - added 7 years ago

Deep below ground strange carnivorous worms glow and twinkle like the night sky to attract their prey. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, a
04:26
Photographing the Real Life of Bees | National Geographic

659 views / 0 likes - added 6 years ago

National Geographic asked photographer Anand Varma to work on a story about honey bees. What he came up with is a work of art. Sponsored by BMWUSA. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's pr
02:58 Popular
Hurricanes 101 | National Geographic

3,104 views / 14 likes - added 5 years ago

Hurricanes are the most powerful storms known to man. Find out when hurricane season peaks, how the storms form, and the surprising role they play in the larger global ecosystem. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #Hurricanes A
03:41
Rainforests 101 | National Geographic

677 views / 1 likes - added 5 years ago

Rainforests are home to over half of the world's plant and animal species. Learn about tropical and temperate rainforests, how they contribute to the global ecosystem, and the conservation efforts being done to protect these biomes. ➡ Subscribe: http://bi
02:15 Popular
360° Great Hammerhead Shark Encounter | National Geographic

2,947 views / 16 likes - added 7 years ago

Dive into this 360° video and go face to face with a curious great hammerhead shark. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Thro
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01:56 Popular
360° Antarctica - Unexpected Snow | National Geographic

1,000 views / 3 likes - added 7 years ago

Explore a penguin and seal colony as a storm moves in. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientis
03:41
Mars 101 | National Geographic

580 views / 0 likes - added 6 years ago

From its blood-like hue to its potential to sustain life, Mars has intrigued humankind for thousands of years. Learn how the red planet formed from gas and dust and what its polar ice caps mean for life as we know it. ➡ Subscribe: http://bit.ly/NatGeoSubs
02:48 Popular
Stars 101 | National Geographic

1,083 views / 0 likes - added 5 years ago

Countless stars dot the night sky. Learn how these celestial objects form, how they are classified by brightness and temperature, and what happens when they die. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #Stars #Educational About Nati
03:06 Popular
Moon 101 | National Geographic

1,260 views / 4 likes - added 5 years ago

What is the moon made of, and how did it form? Learn about the moon's violent origins, how its phases shaped the earliest calendars, and how humans first explored Earth's only natural satellite half a century ago. ➡ Subscribe: http://bit.ly/NatGeoSubscrib
06:49
Free Solo 360 | National Geographic

580 views / 0 likes - added 5 years ago

Immerse yourself in the experience of free solo climbing Yosemite’s famous El Capitan alongside Alex Honnold in this breathtaking 360 video. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium d
00:59
6 Weird Facts About Your Body | National Geographic

224 views / 0 likes - added 1 year ago

About 10,000 human cells can fit on the head of a pinthat and five other facts about the human body. Subscribe: http://bit.ly/NatGeoSubscribeAbout National Geographic:National Geographic is the world's premium destination for science, exploration, and adv
02:55
Caffeine 101 | National Geographic

569 views / 0 likes - added 5 years ago

Nearly 90% of the United States population has at least one caffeinated beverage every day. Learn about the chemistry of caffeine, how it causes increased alertness and focus, and how caffeine is capable of causing overdoses. ➡ Subscribe: http://bit.ly/Na
02:58 Popular
Neptune 101 | National Geographic

1,245 views / 6 likes - added 5 years ago

Neptune is the most distant of the solar system's eight planets. Find out about the blue world's orbit, which of Neptune's moons is the largest, and how the planet is home to the most severe weather in the solar system. ➡ Subscribe: http://bit.ly/NatGeoSu
02:54 Popular
Mosasaurs 101 | National Geographic

962 views / 0 likes - added 5 years ago

Mosasaurs were Earth's last great marine reptiles. Learn about the surprising places they'd hunt, how some species dwarfed even the Tyrannosaurus rex, and how key physical adaptations allowed these reptiles to become a prehistoric apex predator. ➡ Subscri
02:43
Meteor Showers 101 | National Geographic

586 views / 0 likes - added 5 years ago

About 30 meteor showers can be seen from Earth throughout the year. Learn the science behind meteor showers, the dates when showers like the Geminids occur, and the origins of wishing upon a shooting star. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About
01:42
What a World Champion Whistler Sounds Like | National Geographic

440 views / 0 likes - added 6 years ago

Four-time national and international whistling champion Christopher Ullman believes whistling is an art form. Using his lips, tongue, and teeth, he can mimic different instruments or add embellishments to the song—so he's not just your average, ever
03:11 Popular
How We Can Keep Plastics Out of Our Ocean | National Geographic

1,705 views / 4 likes - added 7 years ago

Plastic pollution poses one of the biggest known threats to the ocean, influencing all ecosystems from beautiful coral reefs to abyssal trenches, eventually accumulating in our own food. Learn more about how to upend the current system of produce-use-disc
03:23
How Do Honeybees Get Their Jobs? | National Geographic

499 views / 1 likes - added 5 years ago

Every honeybee has a job to do. Some are nurses who take care of the brood; some are janitors who clean the hive; others are foragers who gather pollen to make honey. Collectively, honeybees are able to achieve an incredible level of sophistication, espec
01:12 Popular
This Sea Slug Eats Its Own Kind | National Geographic

767 views / 1 likes - added 7 years ago

The nudibranch is a cannibalistic sea slug. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photogr
03:11 Popular
Black Holes 101 | National Geographic

1,614 views / 5 likes - added 5 years ago

At the center of our galaxy, a supermassive black hole churns. Learn about the types of black holes, how they form, and how scientists discovered these invisible, yet extraordinary objects in our universe. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #Natio
03:06
Hornets Bake Their Predator | National Geographic

441 views / 0 likes - added 4 years ago

Japanese giant hornets pack a venomous sting so strong it can dissolve human tissue. But when a hornet scout enters a beehive, watch as the bees turn the tables on their enemy — and literally bake the predator to death! Subscribe: http://bit.ly/NatG
02:50
Who Was the First Person to Reach the North Pole? | National Geographic

538 views / 1 likes - added 5 years ago

Reaching the North Pole is no small feat. While many believe the first person to accomplish this daunting task was either Robert Peary or Frederick Cook, the title might actually belong to an African American explorer named Matthew Henson. ➡ Subscribe: ht
01:22 Popular
Continental Drift 101 | National Geographic

2,152 views / 4 likes - added 7 years ago

Plate tectonics have shuffled the earth’s landmasses around—and continue to do so. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More 101 Videos: http://bit.ly/NatGeo101 About National Geographic’s 101 Series: Explore and experience the forces that sha
03:13 Popular
The Kangaroo is the World's Largest Hopping Animal | National Geographic

784 views / 1 likes - added 5 years ago

The kangaroo is one of Australia's most recognizable marsupials and is the only large animal to hop! ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and
03:19
Daylight Saving Time 101 | National Geographic

435 views / 0 likes - added 5 years ago

About 70 countries around the world practice Daylight Saving Time. Find out who came up with the concept of Daylight Saving Time, where the time change was first enacted nationwide, and how some countries are attempting to eliminate it. ➡ Subscribe: http:
04:16 Popular
How Trees Secretly Talk to Each Other in the Forest | National Geographic

798 views / 0 likes - added 5 years ago

What do trees talk about? In the Douglas fir forests of Canada, see how trees “talk” to each other by forming underground symbiotic relationships—called mycorrhizae—with fungi to relay stress signals and share resources with one another. ➡ Subscribe: http
01:32
Corals Collaborating to Eat Jellyfish: First-Ever Video | National Geographic

556 views / 1 likes - added 5 years ago

Filmed for the first time, Astroides calyculariscoral trap and devour “mauve stinger” jellyfish. In the western Mediterranean Sea, the orange coral forms colonies of small organisms called polyps. The polyps are connected, and together act as a single org
02:47
Underwater on Bermudas Montana Shipwreck 180 | National Geographic

449 views / 0 likes - added 5 years ago

Off the coast of Bermuda lies the Montana shipwreck, a civil war blockade runner from 1863. There are over 300 shipwrecks that surround Bermuda. Hard coral and reefs have since grown onto the wreckage, and scientists are able to learn about coral growth b
02:55 Popular
Shark Encounter in 180: Worth More Alive | National Geographic

785 views / 2 likes - added 5 years ago

Come face to face with several species of sharks at Tiger Beach, while on expedition with conservationist Jim Abernethy. Shark diving generates millions of dollars every year in the Bahamas, where the apex predators are protected by the government and the
00:40 Popular
Watch This Sea Creature Shimmer and Disappear Before Your Eyes | National Geographic

971 views / 1 likes - added 7 years ago

Watch the astonishing illusions of a tropical crustacean called the sea sapphire. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through
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00:59
How Ordinary Objects Can Be Turned Into Robots | National Geographic

536 views / 0 likes - added 5 years ago

When NASA put out a call for soft robotic technologies, Rebecca Kramer-Bottiglio and her team at Yale University replied with something remarkable: robotic skins that can wrap around everyday objects, turning almost anything into a moving, grasping robot.
01:20 Popular
Meet a Bizarre and Rare Beetle You’ve Never Seen Before | National Geographic

796 views / 3 likes - added 7 years ago

National Geographic Young Explorer Mark Wong found this strange-looking beetle while walking through the jungle in Singapore. It's a rare and mysterious female trilobite beetle, an ancient-looking insect that has kept scientists baffled for nearly two cen
03:17 Popular
Stunning Close-ups: Meet These Frogs Before They Go Extinct | National Geographic

1,307 views / 12 likes - added 7 years ago

They're charismatic and cute, but the tree frogs that live in Cusuco National Park in Honduras are being decimated by chytrid fungus. The fungus has spread worldwide, causing hundreds of amphibian species to become endangered or even extinct. Biologist an
02:56
Inside the Burial Chambers of Sudans Royal Pyramids: Exclusive | National Geographic

486 views / 0 likes - added 4 years ago

National Geographic explorer Pearce Paul Creasman is leading the excavation of Nuri, a royal burial site with more than 20 pyramids. Many of the tombs have been undisturbed for more than 2,000 years. Subscribe: http://bit.ly/NatGeoSubscribeAbout National
00:34 Popular
Greek And Roman Statues Were Once Colorfully Painted | National Geographic

878 views / 1 likes - added 7 years ago

Greek and Roman statues haven't always had that glazed look in their eyes—many were once painted. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and ad
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04:50
How Your Toothbrush Became a Part of the Plastic Crisis | National Geographic

407 views / 0 likes - added 4 years ago

What does the American Civil War have to do with oral hygiene? Find out in the first episode of "The Story of Plastic" where we investigate how everyday objects became part of the plastic crisis. Subscribe: http://bit.ly/NatGeoSubscribe#NationalGeographic
00:55 Popular
Save ‘Em All: Which Pokémon Are Based on Endangered Animals? | National Geographic

1,301 views / 2 likes - added 7 years ago

These Pokémon characters are based on real-world endangered animals. Watch next: Not Just Fiction: This 'Game of Thrones' Animal Actually Existed: https://www.youtube.com/watch?v=Hx-MPp3NiVE ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geogra
01:12
Mutant Plant Glows When Attacked | National Geographic

499 views / 0 likes - added 5 years ago

When plants are wounded, they send out warning signals that spread to other leaves, raising the alarm and activating defense mechanisms for the undamaged areas. Now, researchers have captured this burst of activity in a set of mesmerizing videos that are
01:08 Popular
How Do Astronauts Stay Hydrated? Pee ... and Other Space Food Facts | National Geographic

829 views / 1 likes - added 7 years ago

Do you know what the first food eaten in space was? (No, it wasn't ice cream.) ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through th
04:20
Sea Turtles Nesting in Costa Rica - 360 | National Geographic

603 views / 0 likes - added 5 years ago

Several times a year, thousands of sea turtles make their way to this beach in Ostional Wildlife Refuge to lay their eggs. Egg harvesting has been legalized in this area to generate income for the community and encourage conservation. Observe this mass-ne
02:03 Popular
Spectacular Time Lapse Dam "Removal" Video | National Geographic

730 views / 1 likes - added 6 years ago

October 28, 2011 — The White Salmon River in Washington state is flowing again as the nearly 100-year-old Condit Dam was disabled with explosives Wednesday. The reservoir draining took about 2 hours. Further demolition is scheduled in 2012. The even
02:53 Popular
Rising Ocean Temperatures are "Cooking" Coral Reefs | National Geographic

1,264 views / 2 likes - added 7 years ago

Oceans are acidifying at a rate faster than any time in the last 300 million years. This year, we've seen the most drastic and damaging coral bleaching event in recent history - and it's attributable to warmer, more acidic oceans. It's time to take bigger
01:20 Popular
How Giant Lava Caves on Earth May Help Us Survive on Mars | National Geographic

894 views / 0 likes - added 7 years ago

The first humans to arrive on Mars will experience life-threatening conditions including intense radiation, dust storms, and extreme temperatures. Researchers are mapping lava tubes at the Craters of the Moon National Monument in Idaho in hopes that their
02:40 Popular
Live a Day in the Life of King Tut | National Geographic

1,536 views / 0 likes - added 6 years ago

Ever wonder how Egyptian royalty lived 3,000 years ago? In 1922, British archaeologist Howard Carter’s discovery of an intact tomb revealed a wealth of artifacts and information that turned King Tut into a household name, and perhaps the most famous
00:42 Popular
Do Your Swimming Skills Match Up to a Humpback Whale’s? | National Geographic

2,386 views / 1 likes - added 7 years ago

Humpback whales are great swimmers, and absolutely massive creatures—some comparable to the size of a bus. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploratio
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00:46
Amazing Footage: Goats Climbing on a Near-Vertical Dam | National Geographic

665 views / 0 likes - added 5 years ago

With split hooves and rubber-like soles, the Alpine ibex is able to climb a near-vertical rock face. Watch next: Mountain Goats Aren't Actually Goats https://www.youtube.com/watch?v=0vGBSUjQDzo See a gallery of ibex photos: http://yourshot.nationalgeograp
03:44
Inside a Dog Retirement Home | National Geographic

490 views / 2 likes - added 6 years ago

Nearly two-dozen dogs are spending their golden years at House with a Heart Senior Pet Sanctuary. Sher Polvinale and a team of volunteers at this Gaithersburg, Maryland, home spare no expense and care for the dogs' every need—from washing and feedin
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Boxing Match: Watch Female Hare Punch Her Suitors | National Geographic

696 views / 2 likes - added 7 years ago

These hares can pack a punch. Filmed just north of Cairngorn National Park in Scotland, these mountain hares are likely tussling over a mate. But unlike other mammals where the males battle it out for a female, mountain hare fights are nearly always betwe
00:50 Popular
Newly Unveiled Dinosaur Fossil is Best Preserved Of Its Kind | National Geographic

810 views / 2 likes - added 7 years ago

See the remains of a nodosaur, the best preserved fossil of its kind ever found. Discovered by miners in Alberta, Canada, it's a 110 million-year-old type of plant-eating armored dinosaur. The animal has two 20-inch-long spikes on its shoulders, and, in l
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01:20 Popular
More Than 800 Ancient Egyptian Tombs Mapped for First Time | National Geographic

798 views / 0 likes - added 5 years ago

More than 800 Egyptian tombs have been mapped for the first time in an ancient necropolis. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #AncientEgypt #Tombs About National Geographic: National Geographic is the world's premium destinatio
01:34
Here's Why Scientists Are Coloring Birds’ Heads With Markers | National Geographic

600 views / 2 likes - added 5 years ago

How do golden-crowned sparrows judge their competition? Previous studies found the patches of yellow plumage on sparrows are indicators of fighting ability. Birds with a bold-colored crown feathers were more dominant than birds with duller colors. When sc
02:03
First Look: Rare Ruby Seadragon Filmed in the Wild | National Geographic

633 views / 2 likes - added 7 years ago

The elusive and delicate ruby seadragon glides through waters off the southern coast of Australia. Video: Scripps Institution of Oceanography, UC San Diego. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the w
01:39
These Plants Eat Salamanders | National Geographic

601 views / 1 likes - added 4 years ago

At a bog in Canada, spotted salamanders serve as a snack for carnivorous pitcher plants. Subscribe: http://bit.ly/NatGeoSubscribe#NationalGeographic #Salamanders #PlantsAbout National Geographic:National Geographic is the world's premium destination for s
02:33
Hear What Space Is Like From NASA's Most Traveled Astronaut | National Geographic

650 views / 0 likes - added 7 years ago

A record-breaking NASA astronaut talks about taking photos from space—especially of U.S. national parks—his record, and the possibility of traveling to Mars. NASA astronaut Jeff Williams has spent 534 days in space, more than any other American astronaut.
02:19 Popular
Why These Tiny Ocean Creatures Are Eating Plastic | National Geographic

749 views / 0 likes - added 6 years ago

When plastic trash degrades in the ocean, it doesn't just go away: It becomes countless tiny particles, and little creatures called larvaceans sweep it up--and into the food chain. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: Nati
02:41
Earwig Wings are Origami-Like | National Geographic

636 views / 0 likes - added 5 years ago

The hidden wings of the common earwig unfold to ten times their folded size, transforming the mostly ground-dwelling insect into a super-efficient flyer. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the worl
10:30
What the Discovery of the Last American Slave Ship Means to Descendants | National Geographic

534 views / 0 likes - added 5 years ago

In this short film, the descendants of Africans on the last known American slave ship, Clotilda, describe what it would mean to discover and document the wreck site of the vessel. Subscribe: http://bit.ly/NatGeoSubscribe#NationalGeographic #Clotilda #Scho
02:04
Snorkeling With President Obama: How Our Photographer Got the Shot (Exclusive) | National Geographic

658 views / 1 likes - added 7 years ago

Brian Skerry, renowned wildlife photographer, reflects on the "once in a lifetime opportunity" to photograph the President while snorkeling. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium d
01:53 Popular
In Ancient Egypt, Even Boats Had Their Own Tombs | National Geographic

2,429 views / 0 likes - added 7 years ago

Archaeologists recently discovered an ancient Egyptian boat burial site dating more than 3,800 years old. National Geographic grantee and Penn Museum Associate Curator Josef Wegner and his team made the discovery while excavating the tomb of 12th Dynasty
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Soar Alongside Migrating Birdsand the Man Who Flies With Them | National Geographic

314 views / 0 likes - added 3 years ago

For more than 20 years, Christian Moullec has guided migrating flocks of vulnerable bird species with his microlight aircraft. Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for s
03:42
See How Termites Inspired a Building That Can Cool Itself | National Geographic

663 views / 0 likes - added 6 years ago

How do you cool a building without air conditioning? Using an approach called biomimicry, see how architect Mick Pearce harnessed the ingenuity of termites to design a natural cooling system for the largest commercial building in Zimbabwe. ➡ Subscribe: ht
03:16
Sumatran Rhinos Are Nearly Gone—New Plan Launched to Save Them | National Geographic

589 views / 0 likes - added 5 years ago

The smallest rhino species also is the smallest in numbers. With fewer than 80 Sumatran rhinos left, a new project launched to save the species. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #SumatranRhino #EndangeredSpecies About Nationa
02:05
Largest Known Marine Stingray Study | National Geographic

627 views / 0 likes - added 4 years ago

Due to the elusive nature of these fish, very little is known about their ecology and behavior. Subscribe: http://bit.ly/NatGeoSubscribe#NationalGeographic #Stingrays #OceansAbout National Geographic:National Geographic is the world's premium destination
01:46 Popular
Sea Cucumber Poop Is Surprisingly Good For the Ecosystem | National Geographic

1,002 views / 1 likes - added 5 years ago

There are about 1,250 different species of sea cucumber across the world's oceans. This is Thelenota anax. And yes, it's doing what you think it's doing. Sea cucumber poop is surprisingly important for the ecosystem. ➡ Subscribe: http://bit.ly/NatGeoSubsc
09:25
Why the US national anthem is terrible — and perfect

444 views / 0 likes - added 5 years ago

Vox's Estelle Caswell and Joss Fong debate "The Star Spangled Banner" Subscribe to our channel! http://goo.gl/0bsAjO When Francis Scott Key attached his poem about the War of 1812 to a popular British song called "To Anacreon in Heaven," he kicked off ove
02:15 Popular
7 Year-Old Crushes National Anthem, Zlatan Approves

926 views / 3 likes - added 5 years ago

The LA Galaxy took on the Seattle Sounders but before the match began #GalaxySocial National Anthem Contest winner 7-year-old Malea Emma sang the national anthem. #Zlatan #Galaxy Subscribe to our channel for more soccer content: http://www.youtube.com/sub
01:30 Popular
Ghost Shark Caught on Camera for the First Time | National Geographic

728 views / 3 likes - added 5 years ago

The pointy-nosed blue chimaera, a species of "ghost shark," was captured on camera for the first time in 2009. Video courtesy Monterey Bay Aquarium Research Institute. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #GhostShark #Sharks Abou
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Smithsonian National Zoo (webisode)

632 views / 0 likes - added 9 years ago

A brief look at Great Museums' episode featuring the Smithsonian National Zoo and its efforts to save endangered species of our planet, which aired on Public Television in Fall 2008. Click on http://greatmuseums.org for more information.
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What’s Special About a Wolf’s Paw Print? | National Geographic

842 views / 3 likes - added 7 years ago

Wolf paws leave behind more than just a print on the ground. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class sc
04:06
This Crazy Tree Grows 40 Kinds of Fruit | National Geographic

324 views / 0 likes - added 3 years ago

Sam Van Aken, an artist and professor at Syracuse University, uses "chip grafting" to create trees that each bear 40 different varieties of stone fruits, or fruits with pits. The grafting process involves slicing a bit of a branch with a bud from a tree o
04:28 Popular
Introduction To Nouns | The Parts Of Speech | Grammar | Khan Academy

1,134 views / 0 likes - added 8 years ago

David, Khan Academy's resident grammarian, introduces you to the most common English part of speech: the noun. Watch the next lesson: https://youtu.be/ETzngG8N3AU About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a pers
03:59 Popular
Meet the Comma | Punctuation | Grammar | Khan Academy

911 views / 1 likes - added 6 years ago

David and Paige introduce you to the superhero of the punctuation world: the comma! Practice this yourself on Khan Academy right now: . Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/
03:43 Popular
BONUS: The Oxford comma | Punctuation | Grammar | Khan Academy

853 views / 0 likes - added 6 years ago

David and Paige tackle the great comma debate of our time: Oxford comma or no Oxford comma? Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/appositives-the-comma-punctuation-khan-academy?utm_source=YT&utm
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Appositives | Punctuation | Grammar | Khan Academy

632 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, cover appositives and how to use commas along with them. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/appositives?utm_source=YT&utm_med
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Introduction to the possessive | The Apostrophe | Punctuation | Khan Academy

608 views / 0 likes - added 6 years ago

Apostrophes can help show when something belongs to someone. Paige and David explain how! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/introduction-to-the-possessive-case Watch the next lesson: https://www
05:12
Ellipses | Punctuation | Khan Academy

674 views / 0 likes - added 6 years ago

Ellipses are three little dots that we use to show a pause or that a portion of a quote has been removed. Learn how to use them in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introd
03:24 Popular
More uses for commas | Punctuation | Grammar | Khan Academy

806 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, discuss tag questions, yes and no statements, and direct address -- all situations where the comma is super useful. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/c
26:38 Popular
Horse Power: The National Museum of Racing

925 views / 0 likes - added 9 years ago

Learn the history of thoroughbred horse racing at the National Racing Museum and Hall of Fame. Produced for Public Television by Great Museums TV. For more information, visit http://greatmuseums.org.
04:35 Popular
Introduction To Singular And Plural Nouns | The Parts Of Speech | Grammar | Khan Academy

1,279 views / 0 likes - added 8 years ago

David, Khan Academy's resident grammarian, introduces the difference between singular and plural nouns. Watch the next lesson: https://youtu.be/uYgcuyUF7JQ About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalize
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Salutations and valedictions | Punctuation | Grammar | Khan Academy

829 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, talk about how to address and sign off on letters using commas! Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/commas-in-space-and-time-the-comma-punctuation-khan-a
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Choosing between its and it’s | The Apostrophe | Punctuation | Khan Academy

533 views / 1 likes - added 6 years ago

David and Paige explain the meaning of two English words that look and sound very similar but act very different: _its_ and _it's_. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe
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A Woman's Touch: The National Museum of Women in the Arts

746 views / 0 likes - added 9 years ago

The National Museum of Women in the Arts in Washington D.C. offers the single most important collection of art by women in the world. The museum provides an astonishing survey of women artists representing every major artistic period from 16th-century Dut
03:36 Popular
Introduction to contractions | The Apostrophe | Punctuation | Khan Academy

940 views / 1 likes - added 6 years ago

Apostrophes are great at standing in for missing letters, allowing us to shorten words. Paige and David discuss contractions and the Principle of Least Effort. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/
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Three types of sentence | Syntax | Khan Academy

643 views / 0 likes - added 6 years ago

Three essential types of sentence are declarative sentences (which are statements), interrogative sentences (which are questions), and imperative sentences (which are orders). Join us as we give examples of each! Practice this yourself on Khan Academy rig
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Commas in dialogue | Punctuation | Grammar | Khan Academy

1,170 views / 1 likes - added 6 years ago

“Today we’re going to talk about using commas in dialogue,” said David and Paige, KA’s resident grammarians. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/commas-in-dialogue?utm_so
07:23 Popular
Irregular Plural Nouns, Part II | The Parts Of Speech | Grammar | Khan Academy

941 views / 0 likes - added 8 years ago

The plural of "whale" is "whales", but what's the plural of "child"? David, Khan Academy's resident grammarian, explains. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower
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National Foods We Got Wrong

111 views / 0 likes - added 1 year ago

Weird History Food is uncovering the unlikely origin of some of your favorite meals. Food is an essential part of culture. As communities, states, and nations form their identities, food becomes part of how they see themselves and shapes the perceptions o
03:08
Hear the Otherworldly Sounds of Skating on Thin Ice | National Geographic

500 views / 0 likes - added 5 years ago

This small lake outside Stockholm, Sweden, emits otherworldly sounds as Mårten Ajne skates over its precariously thin, black ice. “Wild ice skating,” or “Nordic skating,” is both an art and a science. A skater seeks out the t
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Dependent and independent clauses | Syntax | Khan Academy

1,285 views / 0 likes - added 6 years ago

Independent clauses can stand on their own as sentences, but dependent clauses can’t. We’ll take a closer look at what this means. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/dependent-and-independent-clauses Wat
04:53
Subject-verb agreement | Syntax | Khan Academy

631 views / 0 likes - added 6 years ago

Agreement is the art of making sure that sentence parts agree with one another; you want to make sure that your subjects and verbs match up. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/subject-verb-agreement Watc
04:18
How to use italics and underlines | Punctuation | Khan Academy

571 views / 0 likes - added 6 years ago

Learn how to use italics and underlines when writing the titles of works or when emphasizing a particular word or phrase. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/italics--underlines--and-qu
05:45
How Do The Academy Awards Work?

560 views / 0 likes - added 8 years ago

Who is the mysterious ‘Academy’ and how do they pick which movies win at the Oscars? Join Ben to learn the occult science of Academy Awards. Learn more at HowStuffWorks.com: http://entertainment.howstuffworks.co... Share on Facebook: https://goo.gl/ySpZ2R
04:19
Dangling modifiers | Syntax | Khan Academy

595 views / 0 likes - added 6 years ago

A modifying word or phrase “dangles” when it doesn’t apply to the word it’s supposed to modify. Learn how to spot and fix this problem! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/dangling-modifiers/ Watch the ne
05:21
We the People: The National Archives

113 views / 0 likes - added 1 year ago

Once a vision for the United States of America, crafted by our founding fathers, the Declaration of Independence is preserved as living proof of our history at the National Archives and Records Administration. Join a group of middle schoolers on a tour of
04:40 Popular
Petrified Forest National Park | NATURE BOOM TIME

929 views / 0 likes - added 8 years ago

Join Charlie, Kirby, and Patrick on their adventure in the Petrified Forest National Park in this episode of "Nature Boom Time." Learn cool facts about petrified wood––like how it became fossilized and why it’s scattered in eastern Arizo
04:14 Popular
Compound-complex sentences | Syntax | Khan Academy

852 views / 0 likes - added 6 years ago

Compound-complex sentences are compound sentences with dependent or subordinate clauses added to them. Paige and Rosie explain how to spot and use them. Practice this yourself on Khan Academy right now www.khanacademy.org/syntax/e/complex-and-compound-com
02:34 Popular
Irregular Plural Nouns, Part I | The Parts Of Speech | Grammar | Khan Academy

884 views / 0 likes - added 8 years ago

The plural of "dog" is "dogs", but what is the plural of "leaf"? Khan Academy's resident grammarian explains. Watch the next lesson: https://youtu.be/n9poHOKkF28 About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a perso
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Complex sentences | Syntax | Khan Academy

779 views / 0 likes - added 6 years ago

Complex sentences are simple sentences with dependent or subordinate clauses added to them. Paige and Rosie explain how to spot them and use them in this video. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/syntax/v/compound-comple
02:03
The U.S. National Anthem played on 25 electric guitars

667 views / 1 likes - added 5 years ago

Very cool video of the U.S. The National Anthem played on 25 electric guitars...Happy Birthday, America!
04:11
Advanced (plural) possession | The Apostrophe | Punctuation | Khan Academy

563 views / 0 likes - added 6 years ago

Paige and David talk about using apostrophes to show that something belongs to multiple people. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/e/advanved--plural--possesion Watch
02:51
Apostrophes and plurals | The Apostrophe | Punctuation | Khan Academy

466 views / 0 likes - added 6 years ago

There is *one* extremely rare case in which we use apostrophes to make things plural. David and Paige, KA's resident grammarians, discuss this unusual case. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/p
08:26
Conjugate acid-base pairs | Acids and bases | Chemistry | Khan Academy

587 views / 0 likes - added 6 years ago

Introduction to conjugate acid-base pairs. Definition and examples of conjugate acid-base pairs. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivit
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Dashes | Punctuation | Khan Academy

516 views / 0 likes - added 6 years ago

Dashes are like little actors—they can behave like colons, pairs of commas, or parentheses. Learn how to use them in this video! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introduction-to-the-
06:08 Popular
Beginning sentences with conjunctions | The parts of speech | Grammar | Khan Academy

786 views / 0 likes - added 6 years ago

Is it okay to begin a sentence with a conjunction like "but" or "because"? Yes. David explains why. Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/v/correlative-conjunctions?utm_source=YT&utm_medium=D
02:50
Exclamations | Syntax | Khan Academy

479 views / 0 likes - added 6 years ago

An exclamation is a sentence that expresses great emotion! David and Paige covered declarative, interrogative, and imperative sentences; now they tackle a fourth type of sentence that ends in an exclamation mark. Find out more! Watch the next lesson: http
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Commas in space and time | The Comma | Punctuation | Khan Academy

827 views / 0 likes - added 6 years ago

Learn how to use commas when writing addresses (in space) and dates (in time). Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/salutations--valedictions--dates--and-addresses Watch t
03:48
Recognizing fragments | Syntax | Khan Academy

494 views / 0 likes - added 6 years ago

A sentence fragment is a chunk of language that hasn’t made it all the way to being a working sentence; it might be missing a verb, or there might not be a subject. Learn how to turn a fragment into a sentence in this video! Practice this yourself on Khan
01:51
Punctuating a list | Punctuation | Grammar | Khan Academy

584 views / 0 likes - added 6 years ago

Learn how to use commas to punctuate a written list of people, things, actions, or events. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/punctuating-lists?utm_source=YT&utm_medium=
02:34
Subjects and predicates | Syntax | Khan Academy

661 views / 0 likes - added 6 years ago

A subject is the noun or pronoun-based part of a sentence, and a predicate is the verb-based part that the subject performs. Let’s explore how that works in context. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/id
04:51 Popular
Hyphens vs. dashes | Punctuation | Khan Academy

842 views / 1 likes - added 6 years ago

Hyphens and dashes look pretty similar, but their uses are very different! Learn when to use each one in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/dashes-and-hyphens Watch the nex
02:52
Three ways to end a sentence | Punctuation | Khan Academy

586 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, introduce the three ways to end a sentence: the period, the exclamation point, and the question mark. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/three-ways-to-end-a
04:29 Popular
Simple and compound sentences | Syntax | Khan Academy

926 views / 0 likes - added 6 years ago

A simple sentence contains one independent clause. A compound sentence contains more than one! Put another way: a simple sentence contains a subject and a predicate, but a compound sentence contains more than one subject and more than one predicate. Pract
01:51
Possession for words ending in “s” | The Apostrophe | Punctuation | Khan Academy

512 views / 0 likes - added 6 years ago

Do words that end in "s" still need _'s_ to show possession? David and Paige explain! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/introduction-to-the-possessive-case Watch the next lesson: https://www.kha
04:09
Parentheses | Punctuation | Khan Academy

412 views / 0 likes - added 6 years ago

Parentheses set off extra information (such as a writer's remarks, an interruption, or a reference) from the rest of a sentence. Learn how to use them in this video! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneo
04:07 Popular
Pronoun-antecedent agreement | Syntax | Khan Academy

781 views / 0 likes - added 6 years ago

An antecedent is “the thing that came before”. When you use a pronoun, it’s standing in for a word you used previously—that’s the antecedent. Join us as we demonstrate how to make sure that your pronouns and antecedents match up with one another: that’s c
04:44 Popular
Relative clauses | Syntax | Khan Academy

752 views / 0 likes - added 6 years ago

A relative pronoun is a word like “that” or “which” or “who”, so a relative clause is a clause that begins with a relative pronoun. In the sentence “The dragon who breathed blue fire has retired,” “who breathed blue fire” is a relative clause. Learn more
02:22 Popular
See Hummingbirds Fly, Shake, Drink in Amazing Slow Motion | National Geographic

932 views / 1 likes - added 6 years ago

They move so fast that human eyes see only a hovering spot of color, a blur of wings. But when frozen in time by high-speed cameras, hummingbirds yield their secrets. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographi
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04:35
Commas and introductory elements | Punctuation | Grammar | Khan Academy

531 views / 0 likes - added 6 years ago

In English, you use commas to separate introductory elements from the rest of a sentence. Find out how with David and Paige! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/commas-an
04:34
What is a sentence? | Syntax | Khan Academy

565 views / 0 likes - added 6 years ago

A sentence is a grammatically complete idea. All sentences have a noun or pronoun component called the subject, and a verb part called the predicate. David and Paige explore this division across several different example sentences. Watch the next lesson:
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Phrases and clauses | Syntax | Khan Academy

1,524 views / 0 likes - added 6 years ago

A phrase is any collection of words that behaves like a part of speech, like a noun phrase (“my brother Stu”), an adjectival phrase (“in a different shade of blue”), or an adverbial phrase (“with elegance and tact”). A clause is any noun phrase plus a ver
01:40 Popular
Food Too "Ugly" to Sell Becomes a Feast for 5,000 People | National Geographic

774 views / 1 likes - added 7 years ago

What do you do with 2,000 pounds of produce that's perfectly edible but a little blemished? You could throw it out, contributing to the massive food waste problem, which results in roughly a third of the world's food supply going to waste. Or you could co
05:05
Parallel structure | Syntax | Khan Academy

660 views / 0 likes - added 6 years ago

Parallel structure isn’t a set rule, but more of a stylistic choice: it helps sentence elements maintain a pattern. This is a very special episode because it’s Paige’s last video with us as a KA intern! We will miss having Paige as a contributor to the Gr
01:56
Amazing movie scene. French start singing national anthem against the Nazis in Casablanca.

343 views / 0 likes - added 2 years ago

One of the greatest movie scenes of all time: Casablanca, French singing national anthem against Nazis. Vive La France!
05:03 Popular
Indefinite Pronouns | The parts of speech | Grammar | Khan Academy

1,134 views / 0 likes - added 6 years ago

David, Khan Academy's Grammar Fellow, covers three nifty features of indefinite pronouns, which are pronouns that are just a little vague, y'know? Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspee
04:38
Run-ons and comma splices | Syntax | Khan Academy

604 views / 0 likes - added 6 years ago

A run-on sentence doesn’t separate any of its independent clauses with the punctuation that it needs, and a comma splice incorrectly separates two independent clauses with a comma, instead of a comma-and-coordinating-conjunction. Practice this yourself on
56:43 Popular
Wild Thing: The Smithsonian National Zoo

959 views / 2 likes - added 9 years ago

As part of its mission to "advance research and scientific knowledge in conserving wildlife and to teach and inspire people to protect wildlife, natural resources, and habitats," scientists at the National Zoo breed endangered species for the purpose of r
03:13
Using quotation marks in titles | Punctuation | Khan Academy

568 views / 0 likes - added 6 years ago

Learn how to use quotation marks to title things like poems, songs, and episodes of TV shows. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/italics--underlines--and-quotes/ Watch the next lesson:
02:45
Progressive Aspect | The parts of speech | Grammar | Khan Academy

528 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
01:32
Simple Aspect | The parts of speech | Grammar | Khan Academy

608 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
04:47
Who versus whom | The parts of speech | Grammar | Khan Academy

598 views / 0 likes - added 6 years ago

When do you use who, and when do you use whom? David, KA's grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/relative-pronouns?utm_source=YT&utm_medium=Desc&u
07:57 Popular
Le Chatelier's principle: Worked example | Chemical equilibrium | Chemistry | Khan Academy

944 views / 0 likes - added 6 years ago

A worked example using Le Chatelier's principle to predict how concentrations will shift for different perturbations. Example includes changes in reaction vessel volume, changing amount of solid product, adding inert gas, and adding a catalyst. Chemistry
02:31
Perfect Aspect | The parts of speech | Grammar | Khan Academy

689 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
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Why we need national parks - Elyse Cox

818 views / 0 likes - added 3 years ago

Explore the creation of national parks and the importance of finding a balance between public use and ecological preservation.--In 1903, US President Theodore Roosevelt took a camping trip in Californias Yosemite Valley with conservationist John Muir. Roo
07:37
Introduction to reaction quotient Qc | Chemical equilibrium | Chemistry | Khan Academy

653 views / 0 likes - added 6 years ago

Introduction to the reaction quotient Qc, and how to use the reaction quotient to predict how the reaction concentrations will change. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its
01:26
Introduction to verbs | The parts of speech | Grammar | Khan Academy

618 views / 0 likes - added 6 years ago

Let's explore what verbs are, and what they do! David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/identifying-verbs?utm_source=YT&utm_medium
04:33 Popular
Coordinating conjunctions | The parts of speech | Grammar | Khan Academy

997 views / 0 likes - added 6 years ago

Coordinating conjunctions connect parts of sentences to each other. David explains how. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/e/meet-the-conjunction?utm_source=YT&utm_me
02:01 Popular
The present tense | The parts of speech | Grammar | Khan Academy

810 views / 0 likes - added 6 years ago

How do we talk about things that are happening right now? Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-past-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Misse
06:47 Popular
Noble Gas Configuration | Electronic Structure Of Atoms | Chemistry | Khan Academy

1,490 views / 0 likes - added 8 years ago

How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity
02:00 Popular
The past tense | The parts of speech | Grammar | Khan Academy

929 views / 0 likes - added 6 years ago

When you want to talk about events that have already happened, you use the past tense. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-future-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=
03:15
Personal pronouns | The parts of speech | Grammar | Khan Academy

654 views / 0 likes - added 6 years ago

Let's meet the personal pronouns! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/meet-the-personal-pronoun?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next less
03:12 Popular
Correlative conjunctions | The parts of speech | Grammar | Khan Academy

1,015 views / 0 likes - added 6 years ago

Correlative conjunctions work in pairs to connect parts of sentences. David teaches you how they do it! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/e/correlative-conjuntions?u
05:27 Popular
Subordinating conjunctions | The parts of speech | Grammar | Khan Academy

1,248 views / 0 likes - added 6 years ago

Subordinating conjunctions join two parts of complex sentences––independent clauses to dependent clauses. David explains how. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/e/coo
06:19
2022 Scripps National Speed Spelling Bee Winning Moment

217 views / 0 likes - added 2 years ago

Watch the moment Speller 231 Harini Logan won the 2022 Scripps National Spelling Bee via the first Spell-off in Bee history. Her winning word, the final word she spelled correctly during the Spell-off, was "moorhen."
02:50 Popular
The future tense | The parts of speech | Grammar | Khan Academy

966 views / 0 likes - added 6 years ago

When you want to talk about the future in English, you use the future tense. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/linking-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_ca
02:53 Popular
The truly irregular verbs | The parts of speech | Grammar | Khan Academy

1,034 views / 0 likes - added 6 years ago

Some irregular verbs just won't be categorized. They don't fit into neat little boxes. These are those verbs. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-irregular
01:50
Introduction to verb aspect | The parts of speech | Grammar | Khan Academy

575 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
02:54 Popular
Helping verbs | The parts of speech | Grammar | Khan Academy

1,152 views / 0 likes - added 6 years ago

We've established that verbs can show actions and link ideas together. Now, let's talk about how some verbs can be used to help other verbs. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/gra
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Exploring Denali National Park With Real American Sled Dogs

1,143 views / 3 likes - added 7 years ago

In Alaska's Denali National Park, you'll find six million acres of sprawling forests, majestic mountains, active glaciers and flowing rivers. In the midst of this vast natural beauty, around two million acres of federally protected wilderness exists. Here
02:55 Popular
Emphatic pronouns | The parts of speech | Grammar | Khan Academy

893 views / 0 likes - added 6 years ago

Sometimes we use reflexive pronouns like "myself" and "ourselves" for emphasis in a sentence, like, "If you won't help me, then I'll do it myself!" KA's Grammar Fellow, David, explains this usage. Practice this yourself on Khan Academy right now: https://
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What is a pronoun? | The parts of speech | Grammar | Khan Academy

1,078 views / 0 likes - added 6 years ago

Pronouns are words that can replace nouns, like the way "it" replaces "elephant" in "I looked at the elephant. It was grey." Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/the-q
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The irregular verb gets taken for a ride | Grammar | Khan Academy

591 views / 0 likes - added 6 years ago

This group of irregular verbs have vowel sounds that change in a predictable way, when they go from the present to the past tense. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs
05:41 Popular
That versus which | The parts of speech | Grammar | Khan Academy

970 views / 0 likes - added 6 years ago

Much has been made of the distinction between "that" and "which" in English, but it can mostly be summed up in two points: 1. "That" doesn't work so well with commas. 2. "Which" doesn't work so well with people. David the Grammarian explains. Watch the ne
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Reflexive pronouns | The parts of speech | Grammar | Khan Academy

1,089 views / 0 likes - added 6 years ago

We use reflexive pronouns (like "herself" and "ourselves") when the subject and the object of a sentence are the same thing. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/gra
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Pronoun number | The parts of speech | Grammar | Khan Academy

874 views / 0 likes - added 6 years ago

The difference between something being singular or plural is what we call 'grammatical number' in English. Here's how that idea applies to pronouns! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofsp
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Relative pronouns | The parts of speech | Grammar | Khan Academy

1,132 views / 0 likes - added 6 years ago

We use the relative pronouns to connect clauses together, like "the man *who sold the world* is coming over for dinner." David, KA's Grammar Fellow, explains. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/
51:15 Popular
Khan Academy Live: SAT Writing

725 views / 0 likes - added 6 years ago

Need help with SAT writing? Join Eric, one of Khan Academy’s SAT experts, for a live SAT writing class Tuesday, May 30 at 7 pm ET/4pm PT. It’s free! Eric will walk through key grammar concepts like subject-verb agreement and sentence punctuation. Can’t ma
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BONUS VIDEO | Singular They | The parts of speech | Grammar | Khan Academy

517 views / 0 likes - added 6 years ago

You may have been hearing a lot about the "singular they" recently. But what is it? How does it work, what is its history, and is it grammatical? Let's find out. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modif
04:53 Popular
Modal verbs | The parts of speech | Grammar | Khan Academy

1,472 views / 0 likes - added 6 years ago

There's a class of helper verbs known as modals that we use to express a bunch of conditions: we can use them to give advice, make guesses at how necessary or likely something is, make requests of people, and so on. They're super useful. Practice this you
26:38
Triumph of the Spirit: The National D-Day Museum

671 views / 1 likes - added 9 years ago

Now called The National World War Two Museum, this New Orleans-based museum talks about war in human terms and celebrates the American spirit through the personal stories and artifacts of the American men and women who sacrificed and prevailed in an epic
03:02 Popular
Linking verbs | The parts of speech | Grammar | Khan Academy

1,658 views / 0 likes - added 6 years ago

In a previous video, we established that one thing verbs can do is show actions, like "the bear runs." Verbs can also link ideas to one another, like "the bear looks cheerful." Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofs
02:11
Perfect progressive aspect | The parts of speech | Grammar | Khan Academy

539 views / 0 likes - added 6 years ago

We use the perfect progressive aspect to talk about an action that was once ongoing, but has since completed, like "I had been waiting for twenty minutes." Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/pa
05:34
Subject and object pronouns | The parts of speech | Grammar | Khan Academy

531 views / 0 likes - added 6 years ago

Before we get any further with pronouns, let's cover what the difference between a subject and an object pronoun is, because the distinction between those two concepts will start coming up a good deal. Practice this yourself on Khan Academy right now: htt
07:14 Popular
Calculating internal energy and work example | Chemistry | Khan Academy

1,096 views / 0 likes - added 6 years ago

Worked example calculating the change in internal energy for a gas using the first law of thermodynamics. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics-chemistry/internal-energy-sal/v/specific-heat-and-latent-leat-of-
07:50 Popular
pH and pKa relationship for buffers | Chemistry | Khan Academy

834 views / 0 likes - added 6 years ago

How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/
04:39 Popular
Grammatical person and pronouns | The parts of speech | Grammar | Khan Academy

874 views / 0 likes - added 6 years ago

There's this idea in grammar called grammatical person that helps describe who's being talked about in a sentence. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/parts
01:46 Popular
Introduction to verb tense | The parts of speech | Grammar | Khan Academy

811 views / 0 likes - added 6 years ago

An understanding of verb tense will make you into a TIME WIZARD, with the ability to control the past, the present, and the future – with your words, anyway. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/
04:52
Possessive pronouns | The parts of speech | Grammar | Khan Academy

670 views / 0 likes - added 6 years ago

We can use pronouns to show possession relationships, describing what things belong to which people, like "her shoe" or "the book is mine." Possessive pronouns come in two flavors: adjective and noun! David, KA's resident grammarian, covers the difference
03:11 Popular
The vowel-shift irregular verb | The parts of speech | Grammar | Khan Academy

1,190 views / 0 likes - added 6 years ago

This group of irregular verbs have vowel sounds that change in a predictable way, when they go from the present to the past tense. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs
06:52 Popular
Introduction To Partial Pressure | Gases And Kinetic Molecular Theory | Chemistry | Khan Academy

1,640 views / 0 likes - added 8 years ago

Definition of partial pressure and Dalton's law of partial pressure. Example of calculating partial pressure of a gas in a mixture from the total pressure and partial pressure of the other gases in the mixture. Chemistry on Khan Academy: Did you know that
01:25
The National Racing Museum (webisode)

573 views / 0 likes - added 9 years ago

Great Museums TV presents a preview clip of The National Museum of Racing and Thoroughbred Hall of Fame, located in Saratoga Springs, NY. This episode aired on public television stations across the nation. Click on http://greatmuseums.org for more informa
03:29
Introduction to irregular verbs | The parts of speech | Grammar | Khan Academy

568 views / 0 likes - added 6 years ago

Words like "walk" and "look" are regular verbs – they behave in a predictable way. But there's a whole class of words in English, called irregular verbs, that are harder to predict. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Acad
02:46 Popular
Introduction to Grammar | Grammar | Khan Academy

970 views / 0 likes - added 6 years ago

Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English – by speaking it, by writing it, by reading this very sentence – you are a grammarian yourself! Wa
07:33 Popular
Ways to get a buffer solution | Chemistry | Khan Academy

1,260 views / 0 likes - added 6 years ago

Describes the two main situations where you get a buffer: making a buffer for a specific pH by combining a weak acid and a salt containing the conjugate base, and using a neutralization reaction by combining a weak acid and a strong base. Watch the next l
05:53
Comparing Q vs K example | Chemical equilibrium | Chemistry | Khan Academy

589 views / 0 likes - added 6 years ago

A worked example using reaction quotient Q to predict how concentrations will shift so the reaction can get to equilibrium. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/acids-and-bases/v/arrhenius-definition-o
02:11
NASA: National Aeronautics and Space Administration

81 views / 0 likes - added 6 months ago

The National Aeronautics and Space Administration, aka NASA, has been at the forefront of science, technology, and space exploration since 1958. Its work remains an inspiration to millions of people around the world.Untold is a free collection of short, c
06:13 Popular
Rate constant k from half-life example | Knetics | Chemistry | Khan Academy

932 views / 0 likes - added 6 years ago

Example problem showing how to find the rate constant k from the half-life of a first order reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/copy-of-kinetics/v/second-order-reaction-with-calculus?utm_source=YT&u
01:53
The funky -ed irregular verb | The parts of speech | Grammar | Khan Academy

572 views / 1 likes - added 6 years ago

These are the most regular of the irregular verbs; while they don't behave exactly like regular verbs, like present tense "walk" become past tense "walked", they do maintain the "-ed" sound. It's just spelled differently. Practice this yourself on Khan Ac
04:50
Introduction to the apostrophe | The Apostrophe | Punctuation | Khan Academy

608 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, introduce a new piece of punctuation: the apostrophe! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/introduction-to-the-apostrophe Watch the next lesson: https://www.k
00:43
The National D-Day Museum (webisode)

642 views / 0 likes - added 9 years ago

Great Museums TV offers a preview of its episode featuring The National D-Day Museum, which aired on public television stations across the nation. This is not the history of World War II, but the story of what it takes to transform a nation of people into
01:37 Popular
Translation Example | Transformations | Geometry | Khan Academy

1,655 views / 0 likes - added 8 years ago

Translation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campa
1:13:51
Explore U.S. national parks to learn about | Nat Geo Kids Compilation | @natgeokids

24 views / 0 likes - added 1 month ago

Follow Charlie, Kirby, and Patrick as they travel around the United States to learn about different kinds of treesand what makes nature incredibly awesome. Science and history are explained with paper cutouts and goofy-girl Casey back at Headquarters.00:0
02:28 Popular
Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

1,052 views / 0 likes - added 8 years ago

Drawing line of reflection Watch the next lesson: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/v/determining-the-line-of-reflection?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Missed the previous lesson? https://www
04:57
Irregular plural nouns | foreign plurals | The parts of speech | Grammar | Khan Academy

642 views / 0 likes - added 6 years ago

You don't need to know how to speak Latin and Greek in order to understand English, but some words in English come from those languages. It's helpful to know how some Greek and Latin words change from singular to plural. Practice this yourself on Khan Aca
01:25 Popular
Using Rotation Widget | Transformations | Geometry | Khan Academy

1,495 views / 0 likes - added 8 years ago

Using rotation widget Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-rotations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campai
05:32
How one scientist averted a national health crisis - Andrea Tone

459 views / 0 likes - added 6 years ago

TED wants to promote student ideas! Learn more here: http://bit.ly/2M7hd87 View full lesson: https://ed.ted.com/lessons/how-one-scientist-averted-a-national-health-crisis-andrea-tone In 1960, Frances Kelsey was one of the Food and Drug Administration’s ne
08:13 Popular
Points After Rotation | Transformations | Geometry | Khan Academy

1,125 views / 1 likes - added 8 years ago

Points after rotation Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://w
02:46 Popular
Defining Rotation Example | Transformations | Geometry | Khan Academy

1,700 views / 0 likes - added 8 years ago

Defining rotation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/defining-rotations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson
01:48 Popular
Using Reflection Tool | Transformations | Geometry | Khan Academy

1,172 views / 0 likes - added 8 years ago

Using reflection tool Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-reflections-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_camp
05:02 Popular
Positive And Negative Slope | Algebra I | Khan Academy

1,550 views / 0 likes - added 8 years ago

Positive and negative slope Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/v/similar-triangles-to-prove-that-the-slope-is-constant-for-a-line?utm_source=YT&utm_medium=Desc&utm_campaign
01:39
Ida Linnea - Du Gamla, Du Fria (Sweden's National Anthem) Nyckelharpa

25 views / 0 likes - added 1 month ago

Ida Linnea - Du Gamla, Du Fria (Sweden's National Anthem) Nyckelharpa
01:55 Popular
Drawing Image Of Translation | Transformations | Geometry | Khan Academy

1,192 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-translations/e/translations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org
03:37 Popular
Scatterplots — Harder Example | Math | New SAT | Khan Academy

1,330 views / 0 likes - added 8 years ago

Watch Sal work through a harder Scatterplots problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q5-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
04:34 Popular
Scatterplots — Basic Example | Math | New SAT | Khan Academy

1,616 views / 0 likes - added 8 years ago

Watch Sal work through a basic Scatterplots problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q4-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the

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