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  • 08:13 Thomas Malthus and Population Growth

    Thomas Malthus and Population Growth

    374 views / 1 likes - added

    Thomas Malthus's views on population. Malthusian limits. More free lessons at: http://www.khanacademy.org/video?v=r1ywppAJ1xs

  • 05:56 Normal and Inferior Goods

    Normal and Inferior Goods

    260 views / 0 likes - added

    How the demand for some goods could actually go down if incomes go up More free lessons at: http://www.khanacademy.org/video?v=wYuAwm-5-Bk

  • 05:19 Inferior Goods Clarification

    Inferior Goods Clarification

    231 views / 1 likes - added

    More clarification on inferior and normal goods More free lessons at: http://www.khanacademy.org/video?v=TAhRoJB34nw

  • 09:24 Optimal Point on Budget Line

    Optimal Point on Budget Line

    297 views / 0 likes - added

    Using indifference curves to think about the point on the budget line that maximizes total utility More free lessons at: http://www.khanacademy.org/video?v=nhSSu0Nzs30

  • 05:49 Types of Indifference Curves

    Types of Indifference Curves

    263 views / 0 likes - added

    Indifference curves for normal goods, substitutes and perfect complements More free lessons at: http://www.khanacademy.org/video?v=kJ43GdU5Uzc

  • 05:57 Monopolist Optimizing Price (part 3)- Dead Weight Loss.avi

    Monopolist Optimizing Price (part 3)- Dead Weight Loss.avi

    229 views / 0 likes - added

    Showing that what is optimal for the monopolist is not optimal for society More free lessons at: http://www.khanacademy.org/video?v=daxL1ZLrUzg

  • 09:20 Game Theory of Cheating Firms

    Game Theory of Cheating Firms

    294 views / 0 likes - added

    Pareto Optimality and more on Nash Equilibrium. Seeing how cheating duopolists parallels the prisoners dilemma More free lessons at: http://www.khanacademy.org/video?v=XTMbRDRaviM

  • 06:00 Negative Externalities

    Negative Externalities

    247 views / 0 likes - added

    Taking negative externalities into account when thinking about the optimal equilibrium price and quantity More free lessons at: http://www.khanacademy.org/video?v=nBw6KvU51BE

  • 08:55 Blood Sugar Levels

    Blood Sugar Levels

    429 views / 0 likes - added

    Normal and elevated blood sugar levels before (preprandia) and after (postprandial) a meal More free lessons at: http://www.khanacademy.org/video?v=JSFiOF7xGfE

  • 13:14 Scale of the Small

    Scale of the Small

    348 views / 0 likes - added

    From honey bees to cells, virus, and atoms -- understanding the scale of the very small More free lessons at: http://www.khanacademy.org/video?v=ERKx3Oa2omo

  • 10:26 IIT JEE Perpendicular Planes (Part 1)

    IIT JEE Perpendicular Planes (Part 1)

    468 views / 0 likes - added

    2010 IIT JEE Paper 1 #30 normal vector and planes (Part 1) More free lessons at: http://www.khanacademy.org/video?v=2u535-HVJ_o

  • 08:05 IIT JEE Perpendicular Plane (part 2)

    IIT JEE Perpendicular Plane (part 2)

    387 views / 0 likes - added

    2010 IIT JEE Paper 1 #30 normal vector and planes (Part 2) More free lessons at: http://www.khanacademy.org/video?v=66pQLO--Ghk

  • 09:58 Normal vector from plane equation

    Normal vector from plane equation

    354 views / 0 likes - added

    Figuring out a normal vector to a plane from its equation More free lessons at: http://www.khanacademy.org/video?v=gw-4wltP5tY

  • 08:58 A Universe Smaller than the Observable

    A Universe Smaller than the Observable

    221 views / 0 likes - added

    A Universe Smaller than the Observable More free lessons at: http://www.khanacademy.org/video?v=0w9R_foNLrg

  • 13:17 Collective Learning

    Collective Learning

    311 views / 0 likes - added

    How symbolic language drives collective learning and how this is one of the truly differentiating aspects of human beings relative to the rest of the animal kingdom More free lessons at: http://www.khanacademy.org/video?v=NqR_dtZu4Mo

  • 11:30 Ordering Numeric Expressions

    Ordering Numeric Expressions

    233 views / 0 likes - added

    Converting percentages and fractions to decimals to order numbers

  • 09:23 Ordering numeric expressions

    Ordering numeric expressions

    210 views / 0 likes - added

    Ordering numbers expressed as decimals, fractions, and percentages More free lessons at: http://www.khanacademy.org/video?v=Llt-KkHugRQ

  • 04:00 Decimal Place Value

    Decimal Place Value

    284 views / 0 likes - added

    U03_L1_T1_we1 Decimal Place Value More free lessons at: http://www.khanacademy.org/video?v=x-Dqe5U1TXA Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 03:31 Decimal Place Value 2

    Decimal Place Value 2

    258 views / 0 likes - added

    U03_L1_T1_we2 Decimal Place Value 2 More free lessons at: http://www.khanacademy.org/video?v=AuD2TX-90Cc Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:42 Decimals and Fractions

    Decimals and Fractions

    257 views / 0 likes - added

    U03_L1_T1_we3 Decimals and Fractions More free lessons at: http://www.khanacademy.org/video?v=NzIoHQfStoM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:17 Converting Fractions to Decimals Example

    Converting Fractions to Decimals Example

    352 views / 0 likes - added

    u03_l1_t1_we4 Converting Fractions to Decimals More free lessons at: http://www.khanacademy.org/video?v=Y1V5mZaMfTk Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 01:29 Comparing Decimals

    Comparing Decimals

    269 views / 0 likes - added

    U03_L1_T2_we1 Comparing Decimals More free lessons at: http://www.khanacademy.org/video?v=HCC96awA-FM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 01:26 Rounding Decimals

    Rounding Decimals

    356 views / 0 likes - added

    U03_L1_T2_we2 Rounding Decimals More free lessons at: http://www.khanacademy.org/video?v=_MIn3zFkEcc Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 01:40 Decimals on a Number Line

    Decimals on a Number Line

    283 views / 0 likes - added

    u03_l1_t2_we3 Decimals on a Number Line More free lessons at: http://www.khanacademy.org/video?v=LpLnmuAyNWg Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:08 Comparing Decimals 4

    Comparing Decimals 4

    284 views / 0 likes - added

    u03_l1_t2_we4 Comparing Decimals More free lessons at: http://www.khanacademy.org/video?v=FwMYoK1QKso

  • 02:45 Adding Decimals

    Adding Decimals

    345 views / 0 likes - added

    U03_L2_T1_we1 Adding Decimals More free lessons at: http://www.khanacademy.org/video?v=w616LEmrHVE Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:09 Subtracting Decimals

    Subtracting Decimals

    223 views / 0 likes - added

    U03_L2_T1_we2 Subtracting Decimals More free lessons at: http://www.khanacademy.org/video?v=Eq4mVCd-yyo Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:19 Subtracting Decimals Word Problem

    Subtracting Decimals Word Problem

    241 views / 0 likes - added

    U03_L2_T1_we3 Subtracting Decimals Word Problem More free lessons at: http://www.khanacademy.org/video?v=hy_bDS3aHO4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:53 Multiplying Decimals

    Multiplying Decimals

    361 views / 1 likes - added

    U03_L2_T2_we1 Multiplying Decimals More free lessons at: http://www.khanacademy.org/video?v=JEHejQphIYc Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 03:47 Multiplying a Decimal by a Power of 10

    Multiplying a Decimal by a Power of 10

    311 views / 0 likes - added

    u3_l2_t2_we2 Multiplying a Decimal by a Power of 10 More free lessons at: http://www.khanacademy.org/video?v=mV0RxDZG05A Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 05:32 Dividing Decimals

    Dividing Decimals

    322 views / 1 likes - added

    U03_L2_T2_we3 Dividing Decimals More free lessons at: http://www.khanacademy.org/video?v=Nqts8zW8RxM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 03:18 Dividing a Decimal by a Power of 10

    Dividing a Decimal by a Power of 10

    232 views / 0 likes - added

    u3_l2_t2_we4 Dividing a Decimal by a Power of 10 More free lessons at: http://www.khanacademy.org/video?v=W_VhVHRal6o Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 01:51 Dividing Decimals 2.1

    Dividing Decimals 2.1

    275 views / 0 likes - added

    U03_L2_T2_we4.1 Dividing Decimals 2.1 More free lessons at: http://www.khanacademy.org/video?v=HLGCq2h4ihY Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 02:32 Mulitplyling Decimals 3

    Mulitplyling Decimals 3

    226 views / 1 likes - added

    U03_L2_T2_we5 Mulitplyling Decimals 3 More free lessons at: http://www.khanacademy.org/video?v=W7dImsrVa0Y Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 03:01 Estimation with Decimals

    Estimation with Decimals

    284 views / 0 likes - added

    U03_L2_T3_we1 Estimation with Decimals Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 03:32 Representing a number as a decimal, percent, and fraction

    Representing a number as a decimal, percent, and fraction

    230 views / 0 likes - added

    U05_L1_T1_we3 Representing a number as a decimal, percent, and fraction More free lessons at: http://www.khanacademy.org/video?v=-gB1y-PMWfs Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 05:25 Representing a number as a decimal, percent, and fraction 2

    Representing a number as a decimal, percent, and fraction 2

    318 views / 0 likes - added

    U05_L1_T1_we4 Representing a number as a decimal, percent, and fraction 2 More free lessons at: http://www.khanacademy.org/video?v=Hkwfibux88s Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

  • 14:19 Sex-Linked Traits

    Sex-Linked Traits

    477 views / 2 likes - added

    Chromosomal basis for gender. Sex-linked traits. More free lessons at: http://www.khanacademy.org/video?v=-ROhfKyxgCo

  • 09:44 The Mole and Avogadro's Number

    The Mole and Avogadro's Number

    282 views / 0 likes - added

    Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEkF7hcII

  • 13:56 More rigorous Gibbs Free Energy/ Spontaneity Relationship

    More rigorous Gibbs Free Energy/ Spontaneity Relationship

    249 views / 0 likes - added

    More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. More free lessons at: http://www.khanacademy.org/video?v=7aur5h44pV4

  • 26:04 Normal Distribution Excel Exercise

    Normal Distribution Excel Exercise

    346 views / 0 likes - added

    (Long-26 minutes) Presentation on spreadsheet to show that the normal distribution approximates the binomial distribution for a large number of trials. More free lessons at: http://www.khanacademy.org/video?v=yTGEMoaWDCQ

  • 26:24 Introduction to the Normal Distribution

    Introduction to the Normal Distribution

    348 views / 0 likes - added

    Exploring the normal distribution More free lessons at: http://www.khanacademy.org/video?v=hgtMWR3TFnY

  • 10:53 ck12.org Normal Distribution Problems: Qualitative sense of normal distributions

    ck12.org Normal Distribution Problems: Qualitative sense of normal distributions

    363 views / 0 likes - added

    Discussion of how "normal" a distribution might be More free lessons at: http://www.khanacademy.org/video?v=79duxPXpyKQ

  • 07:48 ck12.org Normal Distribution Problems: z-score

    ck12.org Normal Distribution Problems: z-score

    380 views / 0 likes - added

    Z-score practice More free lessons at: http://www.khanacademy.org/video?v=Wp2nVIzBsE8

  • 10:25 ck12.org Normal Distribution Problems: Empirical Rule

    ck12.org Normal Distribution Problems: Empirical Rule

    412 views / 0 likes - added

    Using the empirical rule (or 68-95-99.7 rule) to estimate probabilities for normal distributions More free lessons at: http://www.khanacademy.org/video?v=OhRr26AfFBU

  • 08:16 ck12.org Exercise: Standard Normal Distribution and the Empirical Rule

    ck12.org Exercise: Standard Normal Distribution and the Empirical Rule

    446 views / 0 likes - added

    Using the Empirical Rule with a standard normal distribution More free lessons at: http://www.khanacademy.org/video?v=2fzYE-Emar0

  • 11:11 Small Sample Size Confidence Intervals

    Small Sample Size Confidence Intervals

    434 views / 0 likes - added

    Constructing small sample size confidence intervals using t-distributions More free lessons at: http://www.khanacademy.org/video?v=K4KDLWENXm0

  • 09:04 Small Sample Hypothesis Test

    Small Sample Hypothesis Test

    360 views / 0 likes - added

    Small Sample Hypothesis Test More free lessons at: http://www.khanacademy.org/video?v=D2sMsmL0ScQ

  • 11:47 T-Statistic Confidence Interval

    T-Statistic Confidence Interval

    361 views / 0 likes - added

    T-Statistic Confidence Interval (for small sample sizes) More free lessons at: http://www.khanacademy.org/video?v=hV4pdjHCKuA

  • 13:53 Defining a plane in R3 with a point and normal vector

    Defining a plane in R3 with a point and normal vector

    393 views / 0 likes - added

    Determining the equation for a plane in R3 using a point on the plane and a normal vector More free lessons at: http://www.khanacademy.org/video?v=UJxgcVaNTqY

  • 16:02 A more formal understanding of functions

    A more formal understanding of functions

    429 views / 0 likes - added

    A more formal understanding of functions More free lessons at: http://www.khanacademy.org/video?v=BQMyeQOLvpg

  • 19:12 Lin Alg: Unique rowspace solution to Ax=b

    Lin Alg: Unique rowspace solution to Ax=b

    391 views / 0 likes - added

    Showing that, for any b that is in the column space of A, there is a unique member of the row space that is the "smallest" solution to Ax=b More free lessons at: http://www.khanacademy.org/video?v=czIYvs9zj2g

  • 11:16 Linear Algebra: Introduction to Orthonormal Bases

    Linear Algebra: Introduction to Orthonormal Bases

    373 views / 0 likes - added

    Looking at sets and bases that are orthonormal -- or where all the vectors have length 1 and are orthogonal to each other. More free lessons at: http://www.khanacademy.org/video?v=7BFx8pt2aTQ

  • 15:28 Linear Algebra: Coordinates with respect to orthonormal bases

    Linear Algebra: Coordinates with respect to orthonormal bases

    459 views / 0 likes - added

    Seeing that orthonormal bases make for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=SWbis2zWIvo

  • 16:14 Lin Alg: Projections onto subspaces with orthonormal bases

    Lin Alg: Projections onto subspaces with orthonormal bases

    352 views / 0 likes - added

    Projections onto subspaces with orthonormal bases More free lessons at: http://www.khanacademy.org/video?v=we829K4NOq8

  • 06:42 Lin Alg: Finding projection onto subspace with orthonormal basis example

    Lin Alg: Finding projection onto subspace with orthonormal basis example

    372 views / 0 likes - added

    Example of finding the transformation matrix for the projection onto a subspace with an orthonormal basis More free lessons at: http://www.khanacademy.org/video?v=SUoqA9srY1Q

  • 19:24 Linear Algebra: The Gram-Schmidt Process

    Linear Algebra: The Gram-Schmidt Process

    359 views / 0 likes - added

    Finding an orthonormal basis for a subspace using the Gram-Schmidt Process More free lessons at: http://www.khanacademy.org/video?v=rHonltF77zI

  • 13:14 Linear Algebra: Gram-Schmidt Process Example

    Linear Algebra: Gram-Schmidt Process Example

    365 views / 0 likes - added

    Using Gram-Schmidt to find an orthonormal basis for a plane in R3 More free lessons at: http://www.khanacademy.org/video?v=tu1GPtfsQ7M

  • 05:50 Optimal angle for a projectile part 1

    Optimal angle for a projectile part 1

    207 views / 0 likes - added

  • 04:12 Optimal angle for a projectile part 2 - Hangtime

    Optimal angle for a projectile part 2 - Hangtime

    214 views / 0 likes - added

    Optimal angle for a projectile part 2 - Hangtime More free lessons at: http://www.khanacademy.org/video?v=XtAB9GOfLiM

  • 02:39 Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed)

    Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed)

    256 views / 0 likes - added

    Horizontal distance as a function of angle (and speed) More free lessons at: http://www.khanacademy.org/video?v=-h_x8TwC1ik

  • 07:18 Normal Force and Contact Force

    Normal Force and Contact Force

    244 views / 0 likes - added

    The force that keeps a block of ice from falling towards the center of the earth More free lessons at: http://www.khanacademy.org/video?v=1WOrgrIcQZU

  • 11:49 Normal Force in an Elevator

    Normal Force in an Elevator

    273 views / 0 likes - added

    How the normal force changes when an elevator accelerates More free lessons at: http://www.khanacademy.org/video?v=hoRsHNSrMpc

  • 09:21 SAT Prep: Test 2 Section 6 Part 3

    SAT Prep: Test 2 Section 6 Part 3

    316 views / 0 likes - added

    Problems 10-14 starting on page 474 (but I get the wrong answer for 14 because of a sal malfunction)

  • 12:12 Introduction to Astronomy: Crash Course Astronomy #1

    Introduction to Astronomy: Crash Course Astronomy #1

    378 views / 1 likes - added

    Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" -- Table of Contents: What is Astronomy? 3:00 Who Studie

  • 10:17 Introduction to the Solar System: Crash Course Astronomy #9

    Introduction to the Solar System: Crash Course Astronomy #9

    550 views / 1 likes - added

    In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squaresp

  • 12:55 Asian Responses to Imperialism: Crash Course World History #213

    Asian Responses to Imperialism: Crash Course World History #213

    433 views / 0 likes - added

    In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European powers. We'll look at th

  • 12:31 The Railroad Journey and the Industrial Revolution: Crash Course World History 214

    The Railroad Journey and the Industrial Revolution: Crash Course World History 214

    291 views / 1 likes - added

    In which John Green teaches you about railroads, and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam powered railroads, pretty much all locomotion had

  • 12:51 Popular Population, Sustainability, and Malthus: Crash Course World History 215

    Population, Sustainability, and Malthus: Crash Course World History 215

    733 views / 0 likes - added

    In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In 1800, the human popu

  • 10:41 To Sleep, Perchance to Dream - Crash Course Psychology #9

    To Sleep, Perchance to Dream - Crash Course Psychology #9

    679 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 11:20 The Power of Motivation: Crash Course Psychology #17

    The Power of Motivation: Crash Course Psychology #17

    455 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 09:50 The Growth of Knowledge: Crash Course Psychology #18

    The Growth of Knowledge: Crash Course Psychology #18

    547 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 12:41 Who Won the American Revolution?: Crash Course US History #7

    Who Won the American Revolution?: Crash Course US History #7

    523 views / 0 likes - added

    In which John Green teaches you about the American Revolution. And the Revolutionary War. I know we've labored the point here, but they weren't the same thing. In any case, John will teach you about the major battles of the war, and discuss the strategies

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  • 13:19 Thomas Jefferson&His Democracy: Crash Course US History #10

    Thomas Jefferson&His Democracy: Crash Course US History #10

    474 views / 3 likes - added

    In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a big bundle of contra

  • 14:11 The Market Revolution: Crash Course US History #12

    The Market Revolution: Crash Course US History #12

    359 views / 0 likes - added

    In which John Green teaches you about the Market Revolution. In the first half of the 19th century, the way people lived and worked in the United States changed drastically. At play was the classic (if anything in a 30 year old nation can be called classi

  • 05:28 History of the 4th of July: Crash Course US History Special

    History of the 4th of July: Crash Course US History Special

    393 views / 1 likes - added

    In which John Green teaches you a bit about the 4th of July. In this special short Crash Course, John celebrates American Independence Day by teaching you how the holiday came to be on the 4th of July, and the many ways that Americans celebrate the day. T

  • 13:24 Ford, Carter, and the Economic Malaise: Crash Course US History #42

    Ford, Carter, and the Economic Malaise: Crash Course US History #42

    335 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th

  • 13:53 George HW Bush and the End of the Cold War: Crash Course US History #44

    George HW Bush and the End of the Cold War: Crash Course US History #44

    516 views / 2 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th

  • 12:24 Ghosts, Murder, and More Murder - Hamlet Part I: Crash Course Literature 203

    Ghosts, Murder, and More Murder - Hamlet Part I: Crash Course Literature 203

    430 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th

  • 11:35 Eukaryopolis - The City of Animal Cells: Crash Course Biology #4

    Eukaryopolis - The City of Animal Cells: Crash Course Biology #4

    539 views / 0 likes - added

    Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Se

  • 10:28 Plant Cells: Crash Course Biology #6

    Plant Cells: Crash Course Biology #6

    630 views / 1 likes - added

    Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to&different from animal cells. Crash Course Biology now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-S

  • 14:08 DNA, Hot Pockets,&The Longest Word Ever: Crash Course Biology #11

    DNA, Hot Pockets,&The Longest Word Ever: Crash Course Biology #11

    453 views / 0 likes - added

    Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins. Crash Course B

  • 12:45 Natural Selection - Crash Course Biology #14

    Natural Selection - Crash Course Biology #14

    505 views / 0 likes - added

    Hank guides us through the process of natural selection, the key mechanism of evolution. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.fa

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  • 11:32 Animal Development: We're Just Tubes - Crash Course Biology #16

    Animal Development: We're Just Tubes - Crash Course Biology #16

    478 views / 0 likes - added

    Hank discusses the process by which organisms grow and develop, maintaining that, in the end, we're all just tubes. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse

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  • 10:57 Evolutionary Development: Chicken Teeth - Crash Course Biology #17

    Evolutionary Development: Chicken Teeth - Crash Course Biology #17

    394 views / 0 likes - added

    Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship, and to discover how those processes evolved. Also fruit flie

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  • 12:16 Popular Taxonomy: Life's Filing System - Crash Course Biology #19

    Taxonomy: Life's Filing System - Crash Course Biology #19

    766 views / 0 likes - added

    Hank tells us the background story and explains the importance of the science of classifying living things, also known as taxonomy. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com/You

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  • 08:51 Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

    Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

    386 views / 0 likes - added

    Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like

  • 11:31 Simple Animals: Sponges, Jellies,&Octopuses - Crash Course Biology #22

    Simple Animals: Sponges, Jellies,&Octopuses - Crash Course Biology #22

    437 views / 0 likes - added

    Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses a

  • 13:15 Complex Animals: Annelids&Arthropods - CrashCourse Biology #23

    Complex Animals: Annelids&Arthropods - CrashCourse Biology #23

    313 views / 0 likes - added

    Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com

  • 12:10 Chordates - CrashCourse Biology #24

    Chordates - CrashCourse Biology #24

    331 views / 0 likes - added

    Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal sarcopterygian osteich

  • 10:54 Animal Behavior - CrashCourse Biology #25

    Animal Behavior - CrashCourse Biology #25

    481 views / 0 likes - added

    Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like Crash Course on Facebook: http://www.facebook.com/youtubecrashcour

  • 11:40 Circulatory&Respiratory Systems - CrashCourse Biology #27

    Circulatory&Respiratory Systems - CrashCourse Biology #27

    429 views / 0 likes - added

    Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function. Crash Course Biology is now available on DVD! ht

  • 11:53 The Digestive System: CrashCourse Biology #28

    The Digestive System: CrashCourse Biology #28

    565 views / 3 likes - added

    Hank takes us through the bowels of the human digestive system and explains why it's all about surface area. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like Crash Course? http://www.facebook.com/youtubecrashcourse Follow Crash Cours

  • 12:21 Popular The Excretory System: From Your Heart to the Toilet -  CrashCourse Biology #29

    The Excretory System: From Your Heart to the Toilet - CrashCourse Biology #29

    744 views / 1 likes - added

    Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow Cras

  • 13:11 The Skeletal System: It's ALIVE! - CrashCourse Biology #30

    The Skeletal System: It's ALIVE! - CrashCourse Biology #30

    667 views / 1 likes - added

    Hank introduces us to the framework of our bodies, our skeleton, which apart from being the support and protection for all our fleshy parts, is involved in many other vital processes that help our bodies to function properly. Crash Course Biology is now a

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  • 15:02 Your Immune System: Natural Born Killer - Crash Course Biology #32

    Your Immune System: Natural Born Killer - Crash Course Biology #32

    465 views / 0 likes - added

    Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCour

  • 11:21 Popular Great Glands - Your Endocrine System: CrashCourse Biology #33

    Great Glands - Your Endocrine System: CrashCourse Biology #33

    715 views / 1 likes - added

    Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development&function. Like CrashCourse on Facebook: h

  • 12:17 Old&Odd: Archaea, Bacteria&Protists - CrashCourse Biology #35

    Old&Odd: Archaea, Bacteria&Protists - CrashCourse Biology #35

    434 views / 1 likes - added

    Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most abundant organisms o

  • 09:42 The Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36

    The Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36

    428 views / 0 likes - added

    Hank introduces us to nonvascular plants - liverworts, hornworts&mosses - which have bizarre features, kooky habits, and strange sex lives. Nonvascular plants inherited their reproductive cycle from algae, but have perfected it to the point where it i

  • 11:54 Vascular Plants = Winning! - Crash Course Biology #37

    Vascular Plants = Winning! - Crash Course Biology #37

    335 views / 0 likes - added

    Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and the their secret is also their defining trait: conductive tissues that can take food and water f

  • 10:24 The Plants&The Bees: Plant Reproduction - CrashCourse Biology #38

    The Plants&The Bees: Plant Reproduction - CrashCourse Biology #38

    380 views / 0 likes - added

    Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a whole lot differently compared to the wa

  • 10:26 Popular Ecology - Rules for Living on Earth: Crash Course Biology #40

    Ecology - Rules for Living on Earth: Crash Course Biology #40

    777 views / 0 likes - added

    Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been interacting with ea

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  • 10:31 Mansa Musa and Islam in Africa: Crash Course World History #16

    Mansa Musa and Islam in Africa: Crash Course World History #16

    471 views / 0 likes - added

    In which John Green teaches you about Sub-Saharan Africa! So, what exactly was going on there? It turns out, it was a lot of trade, converting to Islam, visits from Ibn Battuta, trade, beautiful women, trade, some impressive architecture, and several empi

  • 11:32 Wait For It...The Mongols!: Crash Course World History #17

    Wait For It...The Mongols!: Crash Course World History #17

    455 views / 1 likes - added

    Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything

  • 10:47 Russia, the Kievan Rus, and the Mongols: Crash Course World History #20

    Russia, the Kievan Rus, and the Mongols: Crash Course World History #20

    365 views / 0 likes - added

    In which John Green teaches you how Russia evolved from a loose amalgamation of medieval principalities known as the Kievan Rus into the thriving democracy we know today. As you can imagine, there were a few bumps along the road. It turns out, our old fri

  • 12:09 The Columbian Exchange: Crash Course World History #23

    The Columbian Exchange: Crash Course World History #23

    460 views / 0 likes - added

    In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange" by Alfred Cosby, Jr. After Columbus "discovered" the Americas, Eu

  • 11:45 Archdukes, Cynicism, and World War I: Crash Course World History #36

    Archdukes, Cynicism, and World War I: Crash Course World History #36

    566 views / 1 likes - added

    In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War I changed the way people look at the

  • 11:51 Globalization I - The Upside: Crash Course World History #41

    Globalization I - The Upside: Crash Course World History #41

    356 views / 0 likes - added

    In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of t-shirt as it criss-crosses the world before coming to rest on your doorstep, and

  • 02:15 Sesame Street: Jonah Hill Learns the Word, Empty

    Sesame Street: Jonah Hill Learns the Word, Empty

    269 views / 0 likes - added

    There are no pretzels left in the pretzel bowl. There is no water left in the glass, and there are no wild animals in the cage. The bowl, the glass, and the cage are all empty. Fortunately, Jonah Hill and Murray have a box full of crayons to keep the wild

  • 17:28 Sesame Street: Gina Adopts a Baby (Part Two)

    Sesame Street: Gina Adopts a Baby (Part Two)

    471 views / 0 likes - added

    Gina's back from Guatemala with a baby! Alan and Gordon built a crib for the baby so he can make Sesame Street his home. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet You can catch Sesame Str

  • 06:32 Sesame Street: Super Grover Helps a Duck to a Party

    Sesame Street: Super Grover Helps a Duck to a Party

    373 views / 0 likes - added

    This little ducky got all dolled up for a party, but poor little Ducky didn't realize the party was across the stream. She didn't want to get her fancy party shoes all wet and she was too small to fly across the stream, so she called for the help of Super

  • 02:24 Sesame Street: Strenuous with Wendi and Elmo

    Sesame Street: Strenuous with Wendi and Elmo

    293 views / 0 likes - added

    Wendi McLendon-Covey and Elmo are tough. They ran around, lifted a heavy rock, and played tug-of-war with one of the world's strongest animals. What makes something strenuous? Wendi and Elmo can tell you - activities that require a ton of energy and hard

  • 05:52 Sesame Street: Jealous (Word on the Street Podcast)

    Sesame Street: Jealous (Word on the Street Podcast)

    377 views / 0 likes - added

    Jealous is a strong feeling you have when you want something that someone else has. Maybe its that ball that your neighbor has, or the blue toothbrush your older brother has, maybe you're jealous of your dad's mustache! It's normal to feel jealous, but it

  • 01:43 Sesame Street: Maya Angelou's Favorite Things

    Sesame Street: Maya Angelou's Favorite Things

    434 views / 0 likes - added

    Some of Maya Angelou's favorite things were mangoes and marshmallows and moose. She also liked writing memoirs. Mangoes, marshmallows, moose, and memoir all start with the letter M. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subsc

  • 00:45 Sesame Street: "Elmo's World: All About Animals" Preview

    Sesame Street: "Elmo's World: All About Animals" Preview

    434 views / 1 likes - added

    Elmo loves animals. Join Sesame Street's red monster and his special friend Dorothy as they explore wild animals, pets, and more! Over 2 hours of Elmo's World! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_use

  • 01:52 Sesame Street: Troy Polamalu talks Fragrance with Elmo

    Sesame Street: Troy Polamalu talks Fragrance with Elmo

    229 views / 0 likes - added

    Do skunks have a fragrance? Do onions? gym socks? What about Troy Polamalu's curly locks of hair that he washed with strawberry conditioner? Troy and Elmo discuss the word fragrance. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subs

  • 01:01 Sesame Street: Sand Animals Sing a Song

    Sesame Street: Sand Animals Sing a Song

    542 views / 0 likes - added

    Sand animals sing, sing a song Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet For more fun games and videos for your preschooler in a safe, child-friendly environment, visit us at http://www.s

  • 01:27 Sesame Street: Tropical Five

    Sesame Street: Tropical Five

    397 views / 0 likes - added

    Count to five with tropical animals and fruits! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet For more fun games and videos for your preschooler in a safe, child-friendly environment, visit u

  • 04:18 Sesame Street Explores National Parks: Grand Canyon National Park - Seasons

    Sesame Street Explores National Parks: Grand Canyon National Park - Seasons

    309 views / 1 likes - added

    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 Sesame Street Explores National Parks: Grand Canyon National Park -- Habitats

    Sesame Street Explores National Parks: Grand Canyon National Park -- Habitats

    344 views / 1 likes - added

    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

  • 05:29 Sesame Street Explores National Parks: Grand Canyon National Park -- Families

    Sesame Street Explores National Parks: Grand Canyon National Park -- Families

    241 views / 0 likes - added

    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

  • 05:05 Sesame Street: Bert and Ernie's Great Adventures -- Maltese Ducky

    Sesame Street: Bert and Ernie's Great Adventures -- Maltese Ducky

    362 views / 1 likes - added

    Bert and Ernie are Duck Detectives who must solve the mystery of the missing quack. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet For more fun games and videos for your preschooler in a safe,

  • 02:01 Sesame Street: Sesame Street's Search for a New Hispanic Neighbor -- Part Two

    Sesame Street: Sesame Street's Search for a New Hispanic Neighbor -- Part Two

    464 views / 0 likes - added

    Someone new is moving to Sesame Street! Join us for this three part series that chronicles our journey to find the newest addition to the neighborhood. Part two features the small group actors who were called back for the second round of auditions. Subscr

  • 26:38 American Soul: The DuSable Museum of African-American History

    American Soul: The DuSable Museum of African-American History

    482 views / 0 likes - added

    Founded in 1961, the DuSable is one of the first African-American museums in the U.S. It follows African-American history from its beginning on the shores of Africa to a celebration of African-American achievements including those of Bessie Coleman, the n

  • 56:43 Wild Thing: The Smithsonian National Zoo

    Wild Thing: The Smithsonian National Zoo

    597 views / 2 likes - added

    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

  • 01:25 The National Racing Museum (webisode)

    The National Racing Museum (webisode)

    277 views / 0 likes - added

    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

  • 02:56 End of Time - Pentatonix (Beyonce Cover)

    End of Time - Pentatonix (Beyonce Cover)

    475 views / 0 likes - added

    ORDER PTXMAS DELUXE EDITION - http://smarturl.it/PTXmas?IQid=yt ORDER PTX VOL. 2 - http://smarturl.it/PTXVolume2?IQid=yt ORDER PTX VOL. 1 - http://smarturl.it/PTXVol1?IQid=yt http://www.ptxofficial.com http://www.twitter.com/ptxofficial @ptxofficial http:

  • 03:27 We Are Young - Pentatonix (Fun Cover)

    We Are Young - Pentatonix (Fun Cover)

    353 views / 0 likes - added

    2015 TOUR DATES (CITIES&VENUES LISTED BELOW) -- http://ptxofficial.com/tour BUY THAT’S CHRISTMAS TO ME http://smarturl.it/PTXtctmiT?iqiD=YT BUY PTX VOL III http://smarturl.it/PTXVol3?IQId=yt | BUY PTXMAS http://smarturl.it/PTXmas?IQId=yt | BUY PTX VOL I h

  • 08:06 FROZEN MEDLEY (feat. Kirstie Maldonado)

    FROZEN MEDLEY (feat. Kirstie Maldonado)

    398 views / 2 likes - added

    OUR COLLAB WITH THE BEAUTIFUL AND AMAZINGLY TALENTED KIRSTIE MALDONADO :) Follow her!@kirstin_taylorhttps://twitter.com/kirstin_taylorAND US!@scotthoying@mitchgrassiHUGE THANKS to @endlessnoise for recording this and letting us use their studio! Love u @m

  • 09:15 Popular Math Antics - Fractions and Decimals

    Math Antics - Fractions and Decimals

    1,323 views / 8 likes - added

    Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!

  • 06:44 Math Antics - Convert any Fraction to a Decimal

    Math Antics - Convert any Fraction to a Decimal

    601 views / 2 likes - added

    http://www.mathantics.com Here is the video mentioned about converting Base-10 fractions: http://www.youtube.com/watch?v=_jcW-ZgpRbM Here is the video mentioned about decimal numbers: http://www.youtube.com/watch?v=Mst8iZjIpFE And here is the video mentio

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  • 02:16 Only The Strong Survive: Dinosaurs BATTLE

    Only The Strong Survive: Dinosaurs BATTLE

    482 views / 0 likes - added

    When it's mating season, only the strongest survive when two males compete for the affection of a prized female. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 S

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  • 02:15 Small Dinosaurs Get Their Revenge

    Small Dinosaurs Get Their Revenge

    355 views / 0 likes - added

    This dinosaur has a long memory and though he's smaller, he still seeks his revenge. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Subscribe For More Dinosaur V

  • 02:05 Crazy Dinosaur Mating Dance

    Crazy Dinosaur Mating Dance

    467 views / 0 likes - added

    Things get sexy on this edition of Discovery Dinosaurs. It's mating season, and some male dinosaurs create exotic dance displays to get the attention of their potential mates. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?

  • 02:32 So You Think Dinosaurs Can Dance?

    So You Think Dinosaurs Can Dance?

    505 views / 1 likes - added

    Dinosaurs aren't just serious. Let's have some fun and dance with these dinos. The brightly colored Giagantoraptor has and the small Eoraptros seem to have the best moves, but don't count out the Cryolophosaurus - he's not called the Elvisaurus for nothin

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  • 02:21 Popular How Dinosaurs Went Extinct!

    How Dinosaurs Went Extinct!

    713 views / 0 likes - added

    Meteors came hurtling to Earth and stopped life as they knew it for the dinosaurs. Complete and instantaneous extinction is no longer the theory. What did the extinction look like? See how a T-Rex survives impact as some animals did, only to succumb to th

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  • 02:03 GROSS Dinosaur Stuff

    GROSS Dinosaur Stuff

    635 views / 1 likes - added

    Dinosaurs did gross things like sneeze, slobber, and poop. They probably even tripped and fell a bit too. Many had killing habits that might gross you out. See a T-Rex poop before it fights and get its arm bitten off during battle and see a beelzebufo, a

  • 02:13 Small But Deadly!

    Small But Deadly!

    449 views / 0 likes - added

    Don't judge danger by its size. Small dinosaurs were not cute and cuddly. They were just as dangerous if not more, than some big dinosaurs because most hunted in numbers. Troodons attack in numbers. Watch the whole playlist of dinosaur videos here: http:/

  • 02:26 Dinosaurs In Love

    Dinosaurs In Love

    441 views / 0 likes - added

    Saving a female from danger helps one dinosaur Romeo find win her love during mating season. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Subscribe For More Di

  • 02:06 A Look At Prehistoric Mammals

    A Look At Prehistoric Mammals

    418 views / 0 likes - added

    It turns out that dinosaurs weren't the only huge creatures roaming the earth during prehistoric times. This time, we look at Wooly Mammoths and other mammals that also existed millions of years ago. Watch the whole playlist of dinosaur videos here: http:

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  • 02:07 What Did Dinosaurs Eat?

    What Did Dinosaurs Eat?

    613 views / 1 likes - added

    Find out what herbivore dinos ate as dinosaurs large and small graze on sumptuous prehistoric foliage. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Subscribe F

  • 02:17 How Dinosaurs Are Born

    How Dinosaurs Are Born

    481 views / 0 likes - added

    Ever wonder how animals as big as dinosaurs are born? Watch the miracle of life from the dinosaur perspective. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Sub

  • 02:30 SUPER-CUTE VIDEO OF DINOSAUR BABIES!!!

    SUPER-CUTE VIDEO OF DINOSAUR BABIES!!!

    481 views / 1 likes - added

    Baby animals are cute, even T-Rex babies. See a baby Brontosaurus in the egg before it hatches and a baby Tyrannosaurus in its parents mouth. There are more dinosaur babies interacting with their mothers, the world around them, and just plain having fun.

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  • 06:27 Space School- Earth

    Space School- Earth

    497 views / 1 likes - added

    A fragile blue marble floating through space, Earth may seem small, but is unlike any planet ever discovered. Home to millions of species, including humans, the Earth remains a complex and fragile planet, unique in almost every way.

  • 05:07 Why Are Some People Left-handed? - Daniel M. Abrams

    Why Are Some People Left-handed? - Daniel M. Abrams

    593 views / 1 likes - added

    View full lesson: http://ed.ted.com/lessons/why-are-some-people-left-handed-daniel-m-abrams Today, about one-tenth of the world's population are southpaws. Why are such a small proportion...

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  • 03:37 How Does The Thyroid Manage Your Metabolism? - Emma Bryce

    How Does The Thyroid Manage Your Metabolism? - Emma Bryce

    445 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/how-does-the-thyroid-manage-your-metabolism-emma-bryce Nestled in the tissues of your neck is a small, unassuming organ that wields enormous power...

  • 01:26 Eight Questions With Golden State Warrior Harrison Barnes

    Eight Questions With Golden State Warrior Harrison Barnes

    353 views / 0 likes - added

    Our Kid Reporter Jack Murphy interviews the Golden State Warriors' rookie small forward and North Carolina Alum Harrison Barnes.

  • 02:23 Meet Erin DiMeglio, A History Making Female Quarterback

    Meet Erin DiMeglio, A History Making Female Quarterback

    418 views / 1 likes - added

    Erin DiMeglio, an 18-year-old from Florida's South Plantation High School is making history this season by being the first female to play quarterback in a high school game.

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  • 07:05 The Recipe For Life…

    The Recipe For Life…

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    We're cookin' in the primordial kitchen! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart↓ More info and sources below ↓ If the human body could be distilled down into one molecule, what would our chemical formula be? And WHY is it that way? Is

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  • 01:09 What #ScienceWoman Inspires You?

    What #ScienceWoman Inspires You?

    310 views / 0 likes - added

    For more information, click HERE: http://bit.ly/1FTAKiF It's Okay To Be Smart is teaming up with Amy Poehler's Smart Girls to bring you this super-special #ScienceWoman project celebrating women in science. But we can't do it without your help! We want yo

  • 04:46 How Many Heartbeats Do We Get?

    How Many Heartbeats Do We Get?

    351 views / 0 likes - added

    Science really gets my heart going… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart

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  • 06:34 Does My Dog Know What I'm Thinking?

    Does My Dog Know What I'm Thinking?

    489 views / 0 likes - added

    Head to BrainCraft for more doggy science! http://youtu.be/OBy3idLwwYM Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesm

  • 05:45 What's The Deadliest Animal In The World?

    What's The Deadliest Animal In The World?

    465 views / 2 likes - added

    Besides humans, of course. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Gates Foundation info on the world’s

  • 01:59 Monkeying Around - Ultimate Animal Movie Mashup (2015) HD

    Monkeying Around - Ultimate Animal Movie Mashup (2015) HD

    459 views / 3 likes - added

    Subscribe to TRAILERS: http://bit.ly/sxaw6h Subscribe to COMING SOON: http://bit.ly/H2vZUn Like us on FACEBOOK: http://goo.gl/dHs73 Follow us on TWITTER: http://bit.ly/1ghOWmt Monkeying Around - Ultimate Animal Movie Mashup (2015) HD Celebrate nature with

  • 04:14 You Are An Upside-Down Lobster

    You Are An Upside-Down Lobster

    377 views / 1 likes - added

    Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Here's why you aren't built like a lobster. Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow on Tw

  • 01:14 Born In China Official Trailer #1 (2016) - Disneynature Movie HD

    Born In China Official Trailer #1 (2016) - Disneynature Movie HD

    540 views / 1 likes - added

    Subscribe to TRAILERS: http://bit.ly/sxaw6h Subscribe to COMING SOON: http://bit.ly/H2vZUn Like us on FACEBOOK: http://goo.gl/dHs73 Follow us on TWITTER: http://bit.ly/1ghOWmt Born in China Official Trailer #1 (2016) - Disneynature Movie HD Disneynature,

  • 06:16 Congressional Delegation: Crash Course Government And Politics #13

    Congressional Delegation: Crash Course Government And Politics #13

    324 views / 0 likes - added

    In which Craig Benzine teaches you about delegation, and informal powers. What are all these federal agencies about? Well, the president has a lot of stuff to do as the chief executive, and as much as Americans like to talk about personal responsibility,

  • 11:14 How To Draw A Narwhal

    How To Draw A Narwhal

    642 views / 3 likes - added

    It's an underwater unicorn! Today we're learning how to draw a narwhal. These animals really seem like they're from some fantasy world. EMAIL A PHOTO OF YOUR ART: myart@artforkidshub.com MAIL US YOUR ART: Art for Kids Hub P.O. Box 927 Pleasant Grove, UT 8

  • 03:04 Finding Square Root Of Decimal

    Finding Square Root Of Decimal

    359 views / 0 likes - added

    Finding square root of decimal

  • 10:12 Mars: Crash Course Astronomy #15

    Mars: Crash Course Astronomy #15

    460 views / 3 likes - added

    The fourth planet from the sun and the outermost of the terrestrial planets, Mars has long been a popular spot for missions and imagination. Phil walks you through the planet's topography, core, and features. We'll take a look back to Mars's past and make

  • 13:32 What Is The Speed Of Dark?

    What Is The Speed Of Dark?

    362 views / 1 likes - added

    twitter: http://www.twitter.com/tweetsauce instagram: http://www.instagram.com/electricpants facebook: http://www.facebook.com/VsauceGaming SOURCES BELOW: this is the video where I talk about THE SPEED OF PUSH: https://www.youtube.com/watch?v=Do1lm9IevYE

  • 11:12 Popular What Is Random?

    What Is Random?

    1,704 views / 0 likes - added

    There's more over on Veritasium! "What is NOT Random?": https://www.youtube.com/watch?v=sMb00lz-IfE SOURCES AND MORE BELOW! My twitter: https://twitter.com/tweetsauce My instagram: http://instagram.com/electricpants Generate random numbers using atmospher

  • 06:21 An Electric Eel And A Caiman

    An Electric Eel And A Caiman

    359 views / 0 likes - added

    Wherein Isobel and Maria show us the ropes -- or nets -- for surveying fishes in the Amazon. The distribution of fish in tropical river systems is important to understanding how animals move around these waterways. Where there are big fish -- like the ele

  • 03:36 OK Go - White Knuckles - Official Video

    OK Go - White Knuckles - Official Video

    542 views / 0 likes - added

    Official music video for OK Go's 'White Knuckles'. Directed by Trish Sie and OK Go. Produced by Shirley Moyers. Special thanks to: Lauren Henry and Roland Sonnenburg and their team of trainers from Talented Animals, the town of Corvallis OR for being so w

  • 12:16 Chromosomal Crossover In Meiosis I

    Chromosomal Crossover In Meiosis I

    227 views / 0 likes - added

    Chromosomal crossover in Meiosis I

  • 10:44 Jupiter: Crash Course Astronomy #16

    Jupiter: Crash Course Astronomy #16

    560 views / 3 likes - added

    Jupiter is the biggest planet in our solar system. The gas giant is NOT a failed star, but a really successful planet! It has a dynamic atmosphere with belts and zones, as well as an enormous red spot that’s actually a persistent hurricane. Jupiter is sti

  • 15:54 The psychology of self-motivation | Scott Geller | TEDxVirginiaTech

    The psychology of self-motivation | Scott Geller | TEDxVirginiaTech

    426 views / 0 likes - added

    Never miss a talk! SUBSCRIBE to the TEDx channel: http://bit.ly/1FAg8hB Scott Geller is Alumni Distinguished Professor at Virginia Tech and Director of the Center for Applied Behavior Systems in the Department of Psychology. He is a Fellow of the American

  • 02:46 Two Colour Chemiluminescent Clock Reaction - Periodic Table Of Videos

    Two Colour Chemiluminescent Clock Reaction - Periodic Table Of Videos

    288 views / 0 likes - added

    More details in full description. Dr Sam Tang adds hydrogen peroxide to pyrogallol, formaldehyde and luminol. Chemiluminescence is caused by molecules being formed with some of their electrons in a higher energy level and then losing that energy as light.

  • 01:14 Disneynature's Born In China Official US Trailer

    Disneynature's Born In China Official US Trailer

    507 views / 3 likes - added

    Disneynature, in its ongoing quest to bring the natural world to the big screen as never before, presents its most ambitious project to date, taking moviegoers on a grand journey into the wilds of China. “Born In China” follows the adventures of three ani

  • 05:13 Amazing Piece Of Metal (speculum)

    Amazing Piece Of Metal (speculum)

    350 views / 0 likes - added

    This small disc of metal - made from speculum - is an important part of history. The metal is an alloy of tin and copper with some arsenic thrown in. Discussed by Professor Martyn Poliakoff at the Royal Society, in London. It is the primary mirror from Si

  • 04:36 Pouring Mercury Into Liquid Nitrogen (slow Motion)

    Pouring Mercury Into Liquid Nitrogen (slow Motion)

    474 views / 0 likes - added

    Mercury freezes at -39C ---- Nitrogen boils at -196C More slow mo from periodicvideos: http://bit.ly/chemslomo The three slow motion sequences in this video can be seen in more detail at... Mercury in small container: http://youtu.be/-Yf_Mi-ZHjw Mercury i

  • 04:41 Why Neutrinos Matter - Sílvia Bravo Gallart

    Why Neutrinos Matter - Sílvia Bravo Gallart

    283 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/why-neutrinos-matter-silvia-bravo-gallart Elementary particles are the smallest known building blocks in the universe—and the neutrino is one of the smallest of the small. These tiny neutrinos can tell us about

  • 04:10 How To Unboil An Egg - Eleanor Nelsen

    How To Unboil An Egg - Eleanor Nelsen

    421 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/how-to-unboil-an-egg-eleanor-nelsen It’s so obvious that it’s practically proverbial: you can’t unboil an egg. But actually, it turns out that you can -- sort of. Eleanor Nelsen explains the process by which mec

  • 04:31 Why It’s So Hard To Cure HIV/AIDS - Janet Iwasa

    Why It’s So Hard To Cure HIV/AIDS - Janet Iwasa

    480 views / 1 likes - added

    View full lesson: http://ed.ted.com/lessons/why-it-s-so-hard-to-cure-hiv-aids-janet-iwasa In 2008, something incredible happened: a man was cured of HIV. In over 70 million HIV cases, this was a first, and, so far, a last, and we don’t yet understand exac

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  • 05:46 Learning From Smallpox: How To Eradicate A Disease - Julie Garon And Walter A. Orenstein

    Learning From Smallpox: How To Eradicate A Disease - Julie Garon And Walter A. Orenstein

    432 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/learning-from-smallpox-how-to-eradicate-a-disease-julie-garon-and-walter-a-orenstein For most of human history, we have sought to treat and cure diseases. But only in recent decades did it become possible to ens

  • 04:37 The Law Of Conservation Of Mass - Todd Ramsey

    The Law Of Conservation Of Mass - Todd Ramsey

    510 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/the-law-of-conservation-of-mass-todd-ramsey Everything in our universe has mass — from the smallest atom to the largest star. But the amount of mass has remained constant throughout existence even during the bir

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  • 05:42 How We Think Complex Cells Evolved - Adam Jacobson

    How We Think Complex Cells Evolved - Adam Jacobson

    481 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/how-we-think-complex-cells-evolved-adam-jacobson Imagine you swallowed a small bird and suddenly gained the ability to fly … or you ate a cobra and were able to spit poisonous venom! Well, throughout the history

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  • 05:44 The Sonic Boom Problem - Katerina Kaouri

    The Sonic Boom Problem - Katerina Kaouri

    365 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/what-causes-sonic-booms-katerina-kaouri Objects that fly faster than the speed of sound (like really fast planes) create a shock wave accompanied by a thunder-like noise: the sonic boom. These epic sounds can ca

  • 15:47 How Poachers Became Caretakers - John Kasaona

    How Poachers Became Caretakers - John Kasaona

    517 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/how-poachers-became-caretakers-john-kasaona In his home of Namibia, John Kasaona is working on an innovative way to protect endangered animal species: giving nearby villagers (including former poachers) responsi

  • 04:36 How Do Vaccines Work? - Kelwalin Dhanasarnsombut

    How Do Vaccines Work? - Kelwalin Dhanasarnsombut

    451 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/how-do-vaccines-work-kelwalin-dhanasarnsombut The first ever vaccine was created when Edward Jenner, an English physician and scientist, successfully injected small amounts of a cowpox virus into a young boy to

  • 04:34 The Pharaoh That Wouldn't Be Forgotten - Kate Narev

    The Pharaoh That Wouldn't Be Forgotten - Kate Narev

    580 views / 2 likes - added

    View full lesson: http://ed.ted.com/lessons/the-pharaoh-that-wouldn-t-be-forgotten-kate-narev Hatshepsut was a female pharaoh during the New Kingdom in Egypt. Twenty years after her death, somebody smashed her statues, took a chisel and attempted to erase

  • 04:46 How Do We Study The Stars? - Yuan-Sen Ting

    How Do We Study The Stars? - Yuan-Sen Ting

    487 views / 1 likes - added

    View full lesson: http://ed.ted.com/lessons/how-do-we-study-the-stars-yuan-sen-ting Our best technology can send men to the Moon and probes to the edge of our solar system, but these distances are vanishingly small compared to the size of the universe. Ho

  • 04:44 What Is The Heisenberg Uncertainty Principle? - Chad Orzel

    What Is The Heisenberg Uncertainty Principle? - Chad Orzel

    289 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/what-is-the-heisenberg-uncertainty-principle-chad-orzel The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact position and the exact speed of an object. Why not? Because ev

  • 07:30 BIG HERO 6 BAYMAX OREO POPS - NERDY NUMMIES

    BIG HERO 6 BAYMAX OREO POPS - NERDY NUMMIES

    644 views / 2 likes - added

    Today I made Big Hero 6 Baymax Oreo Pops! I really enjoy making nerdy themed goodies and decorating them. I'm not a pro, but I love baking as a hobby. Please let me know what kind of treat you would like me to make next. FOLLOW ME HERE: Facebook: http://w

  • 14:02 DIY TREATS - Perfect Together

    DIY TREATS - Perfect Together

    411 views / 0 likes - added

    Perfect Together on iTunes: http://tinyurl.com/lt3q9ux In celebration of my first original song "Perfect Together" coming out, I asked you guys which treats from the song you'd like me to make. Here are a few of the most requested ones! What are your favo

  • 06:54 DIY Holiday Treats

    DIY Holiday Treats

    363 views / 0 likes - added

    I got so many requests to make some Holiday Treats. Just wanted to share some fun and yummy themed recipes I found. I hope you enjoy them and Happy Holidays! FOLLOW ME HERE Facebook: http://www.facebook.com/rosannapansino Twitter: https://twitter.com/Rosa

  • 02:38 Popular JELLY BELLY FLOWER OREO POPS - Mother's Day - Charli's Crafty Kitchen & Elly Awesome

    JELLY BELLY FLOWER OREO POPS - Mother's Day - Charli's Crafty Kitchen & Elly Awesome

    1,242 views / 4 likes - added

    JELLY BELLY FLOWER OREO POPS - Charli's Crafty Kitchen and Elly Awesome Subscribe to Elly Awesome's channel here: https://www.youtube.com/user/AppChat Taste Test Video: https://www.youtube.com/watch?v=qUfwNY6wYN4 You will need: Jelly Bellies or small Jell

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  • 01:48 Popular EASY PRETZEL HEARTS - Mother's or Valentine's Day Treat Idea

    EASY PRETZEL HEARTS - Mother's or Valentine's Day Treat Idea

    1,630 views / 4 likes - added

    EASY PRETZEL HEARTS - Mothers day treat idea Inspired by: http://www.happyclippings.com/2013/01/valentine-chocolate-heart-pretzel-treats.html You will need: Chocolate, melted and cooled so its just warm (melt for 30 sec at a time in microwave, stirring in

  • 03:05 CINDERELLA BROWNIE JAR TREATS -inspired By The Disney Movie - Kids Baking

    CINDERELLA BROWNIE JAR TREATS -inspired By The Disney Movie - Kids Baking

    617 views / 0 likes - added

    DISNEY CINDERELLA BROWNIE JAR TREATS - easy and so so yummy You will need: Chocolate brownie (baked & cooled) m&ms - we used white and pale blue (find them online) Frosting/Icing 6cm Cinderella figuring (approx) - we found ours on eBay Mason Jar with silv

  • 02:39 Popular HEALTHY FRUIT FLOWER POPS - Easy Watermelon Kebabs Tutorial By Charli's Crafty Kitchen

    HEALTHY FRUIT FLOWER POPS - Easy Watermelon Kebabs Tutorial By Charli's Crafty Kitchen

    725 views / 0 likes - added

    FRUIT FLOWER POPS - Easy watermelon kebabs tutorial by Charli's Crafty Kitchen You will need: Watermelon (whole or half, cut flat about 1" thick) Rockmelon (whole or half, cut flat about 1" thick) Flower cookie cutter set (we used the 2nd biggest and the

  • 02:30 EASTER CHICK POP - Chicken Pops - Easy And Cute Easter Treat

    EASTER CHICK POP - Chicken Pops - Easy And Cute Easter Treat

    474 views / 2 likes - added

    EASTER CHICK POP - Chicken Pops - Easy and cute easter treat You will need: Yellow candy melts or white chocolate dyed yellow with powdered food dye Paper straws Candy eyes or dark chocolate chips Orange jelly belly jelly beans or similar sized jelly bean

  • 05:43 Popular CUPCAKE MARSHMALLOW POPS - Bounce Patrol Kids & Charli's Crafty Kitchen Baking

    CUPCAKE MARSHMALLOW POPS - Bounce Patrol Kids & Charli's Crafty Kitchen Baking

    841 views / 3 likes - added

    CUPCAKE MARSHMALLOW POPS - Bounce Patrol kids & Charli's Crafty Kitchen baking Watch us performing Heads/shoulders with Bounce Patrol: https://www.youtube.com/watch?v=nouDkGtDPNk You will need: Marshmallows Mini Cupcake Liners Cake pop sticks Rainbow spri

  • 02:43 Popular EASY MARSHMALLOW VALENTINES TREATS - Looks Like A Box Of Chocolates

    EASY MARSHMALLOW VALENTINES TREATS - Looks Like A Box Of Chocolates

    1,201 views / 3 likes - added

    EASY MARSHMALLOW VALENTINES TREATS - looks like a box of chocolates You will need: Small Red/Pink gift box Melted chocolate (can be white, milk or dark) Rainbow sprinkles (100's & 1000's) Jumbo Heart sprinkles (Red) Heart Sprinkles (pink) Marshmallows Min

  • 03:00 NEMO MARSHMALLOW POPS - Clownfish Finding Nemo Aquarium Mallow Pops Very Easy

    NEMO MARSHMALLOW POPS - Clownfish Finding Nemo Aquarium Mallow Pops Very Easy

    635 views / 1 likes - added

    NEMO MARSHMALLOW POPS - clownfish nemo aquarium mallow pops very easy You will need: Blue Marshmallows Orange pop sticks White sugar pearls Fish crackers or jumbo fish sprinkles in orange White melted chocolate Cookie crumbs (crushed cookies) Skewers or t

  • 02:34 MALEFICENT Disney Halloween Cupcake Charli Is Maleficent, Ash Is Aurora (Eyedolize Makeup Collab)

    MALEFICENT Disney Halloween Cupcake Charli Is Maleficent, Ash Is Aurora (Eyedolize Makeup Collab)

    443 views / 0 likes - added

    MALEFICENT disney halloween cupcake Makeup tutorial here: https://www.youtube.com/watch?v=BUlBoqgKA-E You will need: Cupcake (baked in green or black wrapper) Purple frosting in piping bag Black fondant/gumpaste Toothpicks If you like this video please sh

  • 03:22 CLOWN PARTY HAT PINATA CONES!  Great For A Carnival Or Circus Birthday Party Theme...surprise Inside

    CLOWN PARTY HAT PINATA CONES! Great For A Carnival Or Circus Birthday Party Theme...surprise Inside

    538 views / 3 likes - added

    Clown Party hat Piñata cones! Great for a carnival or circus birthday party theme! Icecream cones - waffle or regular cones Cookie (that is larger than cone top) Mini M&Ms White melted chocolate melt in microwave 30 sec at a time on high, stirring in betw

  • 03:25 Popular FROZEN ELSA INSPIRED COOKIE POPS - Christmas Disney Oreo Pop Snowflake Party Treats

    FROZEN ELSA INSPIRED COOKIE POPS - Christmas Disney Oreo Pop Snowflake Party Treats

    771 views / 3 likes - added

    FROZEN ELSA INSPIRED COOKIE POPS - cute disney oreo pop snowflake treats Ingredients: White melted chocolate (or blue candy melts) melt in microwave 30 sec at a time on high, stirring in between, add a teaspoon of Crisco/copha to make it easier to dip) Bl

  • 03:26 Popular BALLERINA POPS - Ballet Dancer Party Marshmallow Pops - Easy And Cute Tutu Treats

    BALLERINA POPS - Ballet Dancer Party Marshmallow Pops - Easy And Cute Tutu Treats

    2,444 views / 13 likes - added

    Link to Ballerina cupcakes by My Cupcake Addiction: https://www.youtube.com/watch?v=cMFp64ctRqg&feature=youtu.be BALLERINA POPS - Ballet dancer party marshmallow pops - Easy and cute Ingredients: Regular Marshmallows Mini marshmallows Pink sanding sugar (

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  • 02:55 If Matter Falls Down, Does Antimatter Fall Up? - Chloé Malbrunot

    If Matter Falls Down, Does Antimatter Fall Up? - Chloé Malbrunot

    354 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/if-matter-falls-down-does-antimatter-fall-up-chloe-malbrunot Like positive and negative, or debit and credit, matter and antimatter are equal and opposite. So if matter falls down, does antimatter fall up? Chloé

  • 05:24 What Can Schrödinger's Cat Teach Us About Quantum Mechanics? - Josh Samani

    What Can Schrödinger's Cat Teach Us About Quantum Mechanics? - Josh Samani

    399 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/what-can-schrodinger-s-cat-teach-us-about-quantum-mechanics-josh-samani The classical physics that we encounter in our everyday, macroscopic world is very different from the quantum physics that governs systems

  • 04:47 Inside The Ant Colony - Deborah M. Gordon

    Inside The Ant Colony - Deborah M. Gordon

    469 views / 1 likes - added

    View full lesson: http://ed.ted.com/lessons/inside-the-ant-colony-deborah-m-gordon Ants have one of the most complex social organizations in the animal kingdom; they live in structured colonies that contain different types of members who perform specific

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