Search Results: "take%20that"

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10:16
Comparative Advantage and Absolute Advantage

613 views / 0 likes - added 9 years ago

Showing that a party benefits from trade as long as there is a comparative advantage (and not necessarily an absolute advantage) More free lessons at: http://www.khanacademy.org/video?v=xN3UV5FsBkU
09:24
Optimal Point on Budget Line

617 views / 0 likes - added 9 years ago

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

462 views / 0 likes - added 9 years ago

Showing that what is optimal for the monopolist is not optimal for society More free lessons at: http://www.khanacademy.org/video?v=daxL1ZLrUzg
04:56
Optional Calculus Proof to Show that MR has Twice Slope of Demand

621 views / 0 likes - added 9 years ago

Using some basic calculus to show that marginal revenue has twice the slope of the demand curve for a monopolist More free lessons at: http://www.khanacademy.org/video?v=atI4QH2acuw
09:21
Oligopolies and Monopolistic Competition

508 views / 0 likes - added 9 years ago

Thinking about different markets that are in-between monopolies and perfect competition More free lessons at: http://www.khanacademy.org/video?v=PzDthFTzEa0
08:47
Phillips Curve

568 views / 0 likes - added 9 years ago

The observation that inflation and unemployment tend to be inversely correlated More free lessons at: http://www.khanacademy.org/video?v=v7ZWTZ9NgU4
05:18
Shifts in Aggregate Demand

418 views / 0 likes - added 9 years ago

Factors that might shift aggregate demand More free lessons at: http://www.khanacademy.org/video?v=scN-1B6plos
04:08
Basics of US income tax rate schedule

494 views / 0 likes - added 9 years ago

Understanding that a marginal tax rate does not apply to all of income More free lessons at: http://www.khanacademy.org/video?v=OGVJfcSckUs
09:12
Koch Snowflake Fractal

700 views / 0 likes - added 9 years ago

A shape that has an infinite perimeter but finite area More free lessons at: http://www.khanacademy.org/video?v=azBNsPa1WC4
15:43 Popular
Calculus: Derivatives 1 (new HD version)

886 views / 0 likes - added 9 years ago

Calculus-Derivative: Understanding that the derivative is just the slope of a curve at a point (or the slope of the tangent line) More free lessons at: http://www.khanacademy.org/video?v=ANyVpMS3HL4
05:20
While Loops in Python

519 views / 0 likes - added 9 years ago

Seeing that a while loop can do the same thing as a for loop
02:12 Popular
Exercise - Write a Sorting Function

966 views / 0 likes - added 9 years ago

Challenge to write a Python function that can sort a list in-place
09:34
Projectile motion (part 5)

446 views / 0 likes - added 9 years ago

How fast was the ball that you threw upwards? More free lessons at: http://www.khanacademy.org/video?v=dlpmllTx5MY
10:01
Visual Proof: a= v^2/r

526 views / 0 likes - added 9 years ago

Visual proof that centripetal acceleration = v^2/r
10:14
Calculus Proof that a=v^2/r

653 views / 0 likes - added 9 years ago

Using calculus and vectors to show that centripetal acceleration = v^2/r
04:12
Correction Calendar Notation

563 views / 0 likes - added 9 years ago

Correcting the time difference calculation by taking into account that there is no year 0 More free lessons at: http://www.khanacademy.org/video?v=N06Jy-gQog8
10:35
Potassium-Argon (K-Ar) Dating

628 views / 0 likes - added 9 years ago

How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between More free lessons at: http://www.khanacademy.org/video?v=NMZ5kJEviD0
01:04
Ape Clarification

446 views / 0 likes - added 9 years ago

Ape Clarification - that they have no tails More free lessons at: http://www.khanacademy.org/video?v=oFGkYA_diDA
11:36
Intelligent Design and Evolution

546 views / 0 likes - added 9 years ago

The argument that evolution speaks to being the most "intelligent design" More free lessons at: http://www.khanacademy.org/video?v=qxOEz9aPZNY
12:22
Exponential Decay Formula Proof (can skip, involves Calculus)

641 views / 0 likes - added 9 years ago

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at: http://www.khanacademy.org/video?v=H7nrVDV8ahc
16:56 Popular
Proof: U=(3/2)PV or U=(3/2)nRT

793 views / 0 likes - added 9 years ago

Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. More free lessons at: http://www.khanacademy.org/video?v=qSFY7GKhSRs
19:03 Popular
Work Done by Isothermic Process

1,427 views / 0 likes - added 9 years ago

Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added. More free lessons at: http://www.khanacademy.org/video?v=iiFWoXQPOJc
15:38
Proof: S (or Entropy) is a valid state variable

517 views / 0 likes - added 9 years ago

Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5RrFus1Q
15:38
Thermodynamic Entropy Definition Clarification

507 views / 0 likes - added 9 years ago

Clarifying that the thermodynamic definition of Entropy requires a reversible system. More free lessons at: http://www.khanacademy.org/video?v=PFcGiMLwjeY
13:27
Maxwell's Demon

579 views / 0 likes - added 9 years ago

Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics More free lessons at: http://www.khanacademy.org/video?v=aKRDvSZ-igA
12:17
Carnot Efficiency 3: Proving that it is the most efficient

483 views / 0 likes - added 9 years ago

Proving that a Carnot Engine is the most efficient engine More free lessons at: http://www.khanacademy.org/video?v=LUoUb4hGMH8
12:53
Unemployment

529 views / 0 likes - added 9 years ago

Analyzing unemployment data to show that "real" unemployment is worse than the headline numbers show. More free lessons at: http://www.khanacademy.org/video?v=vUOiOi-XaoQ
12:25
Geithner Plan 2.5

580 views / 0 likes - added 9 years ago

More exotic ways that a bank could buy transfer exposure to the taxpayer. More free lessons at: http://www.khanacademy.org/video?v=0FxRYePmogU
26:04 Popular
Normal Distribution Excel Exercise

1,628 views / 0 likes - added 9 years ago

(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
06:47 Popular
Squared Error of Regression Line

707 views / 0 likes - added 9 years ago

Introduction to the idea that one can find a line that minimizes the squared distances to the points More free lessons at: http://www.khanacademy.org/video?v=6OvhLPS7rj4
10:51
Bailout 5: Paying off the debt

587 views / 0 likes - added 9 years ago

How the bank can liquidate assets to pay off debt that comes due. More free lessons at: http://www.khanacademy.org/video?v=I8BLj7cRM7c
12:22
Bailout 14: Possible Solution

638 views / 0 likes - added 9 years ago

A solution that is MUCH fairer that has a MUCH better chance of working! More free lessons at: http://www.khanacademy.org/video?v=BdmI14oSe4g
11:19
Banking 12: Treasuries (government debt)

699 views / 0 likes - added 9 years ago

Introduction to government debt and treasuries. What it means when we say that Federal Reserve Notes are issued by the Reserve bank but are an obligation of the Government. More free lessons at: http://www.khanacademy.org/video?v=JBWdbzzYbtU
08:26
Integrating factors 2

493 views / 0 likes - added 9 years ago

Now that we've made the equation exact, let's solve it! More free lessons at: http://www.khanacademy.org/video?v=0NyeDUhKwBE
19:12 Popular
Laplace/Step Function Differential Equation

737 views / 0 likes - added 9 years ago

Hairy differential equation involving a step function that we use the Laplace Transform to solve. More free lessons at: http://www.khanacademy.org/video?v=R0JY8oWsuOY
10:23
Introduction to the Null Space of a Matrix

668 views / 0 likes - added 9 years ago

Showing that the Null Space of a Matrix is a valid Subspace More free lessons at: http://www.khanacademy.org/video?v=jCwRV1QL_Xs
08:33
Showing relation between basis cols and pivot cols

633 views / 0 likes - added 9 years ago

Showing that linear independence of pivot columns implies linear independence of the corresponding columns in the original equation More free lessons at: http://www.khanacademy.org/video?v=BfVjTOjvI30
13:40
Showing that the candidate basis does span C(A)

625 views / 0 likes - added 9 years ago

Showing that just the columns of A associated with the pivot columns of rref(A) do indeed span C(A). More free lessons at: http://www.khanacademy.org/video?v=CkQOCnLWPUA
16:37 Popular
im(T): Image of a Transformation

732 views / 0 likes - added 9 years ago

Showing that the image of a subspace under a transformation is also a subspace. Definition of the image of a Transformation. More free lessons at: http://www.khanacademy.org/video?v=hZ827mfh1Jo
11:59 Popular
Matrix Product Associativity

709 views / 0 likes - added 9 years ago

Showing that matrix products are associative More free lessons at: http://www.khanacademy.org/video?v=Hhc96U_HvQE
09:52 Popular
Distributive Property of Matrix Products

756 views / 0 likes - added 9 years ago

Showing that matrix products exhibit the distributive property More free lessons at: http://www.khanacademy.org/video?v=oMWTMj78cwc
20:00
Linear Algebra: Matrix condition for one-to-one trans

690 views / 0 likes - added 9 years ago

Showing that the rank of the of an mxn transformation matrix has to be an for the transformation to be one-to-one (injective) More free lessons at: http://www.khanacademy.org/video?v=M3FuL9qKTBs
06:37
Linear Algebra: Simplifying conditions for invertibility

639 views / 0 likes - added 9 years ago

Showing that a transformation is invertible if and only if rref(A) is equal to the identity matrix More free lessons at: http://www.khanacademy.org/video?v=Yz2OosyMTmY
21:25
Linear Algebra: Showing that Inverses are Linear

609 views / 0 likes - added 9 years ago

Showing that inverse transformations are also linear More free lessons at: http://www.khanacademy.org/video?v=mr9Tow8hpCg
02:52 Popular
Linear Algebra: (correction) scalar muliplication of row

988 views / 0 likes - added 9 years ago

Correction of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant More free lessons at: http://www.khanacademy.org/video?v=WY6QG0mZ7uQ
16:55 Popular
Linear Algebra: Determinant when row is added

914 views / 0 likes - added 9 years ago

The determinant when one matrix has a row that is the sum of the rows of other matrices (and every other term is identical in the 3 matrices) More free lessons at: http://www.khanacademy.org/video?v=VrB3LaSD_uo
21:38 Popular
Linear Algebra: Determinant and area of a parallelogram

1,260 views / 0 likes - added 9 years ago

Realizing that the determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix More free lessons at: http://www.khanacademy.org/video?v=n-S63_goDFg
14:10
Linear Algebra: Determinant of Transpose

687 views / 0 likes - added 9 years ago

Proof by induction that transposing a matrix does not change its determinant More free lessons at: http://www.khanacademy.org/video?v=x-GV2v0dRNE
09:27
Linear Algebra: dim(V) + dim(orthogonoal complelent of V)=n

629 views / 0 likes - added 9 years ago

Showing that if V is a subspace of Rn, then dim(V) + dim(V's orthogonal complement) = n More free lessons at: http://www.khanacademy.org/video?v=pGhBfkBqok0
27:01 Popular
Lin Alg: Representing vectors in Rn using subspace members

1,092 views / 0 likes - added 9 years ago

Showing that any member of Rn can be represented as a unique sum of a vector in subspace V and a vector in the orthogonal complement of V. More free lessons at: http://www.khanacademy.org/video?v=M6lFqkqvUgo
12:18
Lin Alg: Orthogonal Complement of the Orthogonal Complement

632 views / 0 likes - added 9 years ago

Finding that the orthogonal complement of the orthogonal complement of V is V More free lessons at: http://www.khanacademy.org/video?v=zlI8mx8Hc8o
19:12 Popular
Lin Alg: Unique rowspace solution to Ax=b

724 views / 0 likes - added 9 years ago

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
12:34
Lin Alg: Showing that A-transpose x A is invertible

668 views / 0 likes - added 9 years ago

Showing that (transpose of A)(A) is invertible if A has linearly independent columns More free lessons at: http://www.khanacademy.org/video?v=ESSMQH6Y5OA
09:28
Linear Alg: Visualizing a projection onto a plane

661 views / 0 likes - added 9 years ago

Visualizing a projection onto a plane. Showing that the old and new definitions of projections aren't that different. More free lessons at: http://www.khanacademy.org/video?v=uWbZlJURkfA
16:16
Lin Alg: A Projection onto a Subspace is a Linear Transforma

687 views / 0 likes - added 9 years ago

Showing that a projection onto a subspace is a linear transformation More free lessons at: http://www.khanacademy.org/video?v=cTyNpXB92bQ
09:05 Popular
Linear Alg: Projection is closest vector in subspace

713 views / 0 likes - added 9 years ago

Showing that the projection of x onto a subspace is the closest vector in the subspace to x More free lessons at: http://www.khanacademy.org/video?v=b269qpILOpk
12:36 Popular
Lin Alg: Alternate Basis Tranformation Matrix Example Part 2

921 views / 0 likes - added 9 years ago

Showing that the transformation matrix with respect to basis B actually works. Brief point on why someone would want to operate in a different basis to begin with. More free lessons at: http://www.khanacademy.org/video?v=EyORbCPUAd4
11:16
Linear Algebra: Introduction to Orthonormal Bases

666 views / 0 likes - added 9 years ago

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 Popular
Linear Algebra: Coordinates with respect to orthonormal bases

764 views / 0 likes - added 9 years ago

Seeing that orthonormal bases make for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=SWbis2zWIvo
11:16 Popular
Lin Alg: Orthogonal matrices preserve angles and lengths

763 views / 0 likes - added 9 years ago

Showing that orthogonal matrices preserve angles and lengths More free lessons at: http://www.khanacademy.org/video?v=yDwIfYjKEeo
13:09 Popular
Linear Algebra: Showing that an eigenbasis makes for good coordinate systems

703 views / 0 likes - added 9 years ago

Showing that an eigenbasis makes for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=C2PC9185gIw
16:52 Popular
Conditional Probability and Combinations

751 views / 0 likes - added 9 years ago

Probability that I picked a fair coin given that I flipped 4 out of 6 heads. More free lessons at: http://www.khanacademy.org/video?v=xw6utjoyMi4
13:17 Popular
Birthday Probability Problem

827 views / 0 likes - added 9 years ago

The probability that at least 2 people in a room of 30 share the same birthday. More free lessons at: http://www.khanacademy.org/video?v=9G0w61pZPig
07:18
Normal Force and Contact Force

588 views / 0 likes - added 9 years ago

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
12:43
Inclined Plane Force Components

696 views / 0 likes - added 9 years ago

Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane More free lessons at: http://www.khanacademy.org/video?v=TC23wD34C7k
09:13 Popular
Unit Vector Notation (part 2)

1,748 views / 0 likes - added 9 years ago

More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method More free lessons at: http://www.khanacademy.org/video?v=595Tiga1gIg
14:22
Calculus proof of centripetal acceleration formula

624 views / 0 likes - added 9 years ago

Proving that a = v^2/r More free lessons at: http://www.khanacademy.org/video?v=XjCEumlJBno
10:09
Fluids (part 9)

550 views / 0 likes - added 9 years ago

Second part of the Bernoulli's Equation proof. Beginning of a problem that uses the equation. More free lessons at: http://www.khanacademy.org/video?v=QX2YLR09Q78
08:36
Fluids (part 10)

494 views / 0 likes - added 9 years ago

Second part of the example that uses Bernoulli's equation. More free lessons at: http://www.khanacademy.org/video?v=NGpJPz44JYc
10:18
Thermodynamics (part 2)

403 views / 0 likes - added 9 years ago

Example problem that pv=pv. Introduction to temperature. More free lessons at: http://www.khanacademy.org/video?v=x34OTtDE5q8
14:02
Electrostatics (part 1): Introduction to Charge and Coulomb's Law

598 views / 0 likes - added 9 years ago

Introduction to Charge and Coulomb's Law (video from May 2008 that I forgot to upload) More free lessons at: http://www.khanacademy.org/video?v=NXMgvrS8Gr8
11:29 Popular
Proof (Advanced): Field from infinite plate (part 2)

959 views / 1 likes - added 9 years ago

We see that the infinite, uniformly charged plate generates a constant electric field (independent of the height above the plate) More free lessons at: http://www.khanacademy.org/video?v=TxwE4_dXo8s
11:00
Magnetism 7

524 views / 0 likes - added 9 years ago

The magnetic force that two current-carrying wires exert on each other. More free lessons at: http://www.khanacademy.org/video?v=l3hw0twZSCc
09:05
The Bicameral Congress: Crash Course Government and Politics #2

700 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about the United States Congress, and why it's bicameral, and what bicameral means. Craig tells you what the Senate and House of Representatives are for, some of the history of the institutions, and reveal to you just ho
08:31 Popular
Separation of Powers and Checks and Balances: Crash Course Government and Politics #3

1,687 views / 2 likes - added 9 years ago

In which Craig Benzine teaches you about the US Governments Separation of powers and the system of checks and balances. In theory, the Legislative Branch, the Executive Branch, and the Judicial Brach are designed to keep each other in check, and to keep a
09:15
Federalism: Crash Course Government and Politics #4

691 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about federalism, or the idea that in the United States, power is divided between the national government and the 50 state governments. Craig will teach you about how federalism has evolved over the history of the US, an
08:57 Popular
Constitutional Compromises: Crash Course Government and Politics #5

788 views / 1 likes - added 9 years ago

In which Craig Benzine teaches you about the compromises met in ratifying the U.S. Constitution. The United State’s didn’t always have its current system of government. Actually, this is it’s second attempt. Craig will delve into the failures (and few suc
08:28
Congressional Committees: Crash Course Government and Politics #7

695 views / 0 likes - added 9 years ago

This week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the candidate-choosing kinds) as well as the staff agencies that help advise these c
06:36
Congressional Decisions: Crash Course Government and Politics #10

630 views / 0 likes - added 9 years ago

This week Craig breaks out the crystal ball to try and figure out why our congresspeople do the things that they do. We’ll talk about the three motivating factors of congressional decisions - constituency, interest groups, and political parties - and we’l
06:30 Popular
Presidential Power: Crash Course Government and Politics #11

736 views / 0 likes - added 9 years ago

This week Craig looks at the expressed powers of the President of the United States - that is the ones you can find in the Constitution. From appointing judges and granting pardons, to vetoing laws and acting as the nation’s chief diplomat on foreign poli
09:29
Cycles in the Sky: Crash Course Astronomy #3

624 views / 0 likes - added 9 years ago

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of
12:04 Popular
The Sun: Crash Course Astronomy #10

796 views / 2 likes - added 9 years ago

Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet. This epis
10:02 Popular
Peripheral Nervous System: Crash Course A&P #12

1,530 views / 2 likes - added 9 years ago

It is now time to meet the system that helps your crazy brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and efferent divisions, how it proc
08:49 Popular
Autonomic Nervous System: Crash Course A&P #13

1,512 views / 1 likes - added 9 years ago

Hank takes you on a tour of your two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences - where ner
14:25 Popular
The Big Bang: Crash Course Big History #1

1,184 views / 4 likes - added 9 years ago

In which John Green, Hank Green, and Emily Graslie teach you about, well, everything. Big History is the history of everything. We're going to start with the Big Bang, take you right through all of history (recorded and otherwise), and even talk a little
14:33 Popular
The Sun&The Earth: Crash Course Big History #3

938 views / 2 likes - added 9 years ago

In which John Green, Hank Green, and Emily Graslie teach you about our Sun, and the formation of the planets. We're going to focus on the formation and development of the Earth, because that's where people live. You'll learn about the Solar nebula, the bi
13:29 Popular
Life Begins: Crash Course Big History #4

879 views / 1 likes - added 9 years ago

In which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you about the earliest forms of life on Earth, and some of the ways that they dev
13:58 Popular
The Modern Revolution: Crash Course Big History #8

808 views / 0 likes - added 9 years ago

In which Hank and John Green teach you a Crash Course on the modern revolution, and the upside of the progress that humanity has made in the last 500 years or so. And while there are two sides to every history, and many of these changes haven't been great
12:20
The Anthropocene and the Near Future: Crash Course Big History #9

683 views / 1 likes - added 9 years ago

In which John Green, Hank Green, and Emily Graslie teach you about the Anthropocene, an unofficial geological era that covers the last century or so, in which humanity has made massive progress. We've discovered the Higgs-Boson particle, and awesome elect
14:04 Popular
Money&Debt: Crash Course World History 202

901 views / 0 likes - added 9 years ago

In which John Green teaches about filthy, filthy lucre. Money. And Debt. So, what is money? And what is it for? And why do we use money? And why does it all disappear so quickly after payday? John will look into 75% of these questions, and if he doesn't c
11:37 Popular
Disease! Crash Course World History 203

975 views / 2 likes - added 9 years ago

In which John Green teaches you about disease, and the effects that disease has had in human history. Disease has been with man since the beginning, and it has shaped the way humans operate in a lot of ways. John will teach you about the Black Death, the
10:37 Popular
War&Human Nature: Crash Course World History 204

908 views / 2 likes - added 9 years ago

In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the effects that war ha
10:08 Popular
Climate Change, Chaos, and The Little Ice Age - Crash Course World History 206

1,144 views / 2 likes - added 9 years ago

In which John Green teaches you about the Little Ice Age. The Little Ice Age was a period of global cooling that occurred from the 13th to the 19th centuries. This cooling was likely caused by a number of factors, including unusual solar activity and volc
07:21 Popular
Humans and Energy: Crash Course World History 207

1,098 views / 1 likes - added 9 years ago

In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun. Historically, almost all of the energy that humans use has been directly or indirec
10:30 Popular
Drought and Famine: Crash Course World History #208

1,212 views / 0 likes - added 9 years ago

In which John Green teaches you a little bit about drought, which is a natural weather phenomenon, and famine, which is almost always the result of human activity. Throughout human history, when food shortages strike humanity, there was food around. There
09:10 Popular
HOW World War I Started: Crash Course World History 209

1,497 views / 6 likes - added 9 years ago

In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great War. You'll learn ab
10:56 Popular
Who Started World War I: Crash Course World History 210

1,070 views / 3 likes - added 9 years ago

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius Caesar? One thing w
12:59 Popular
The End of Civilization (In the Bronze Age): Crash Course World History 211

859 views / 1 likes - added 9 years ago

In which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The Levant, and Mesopotamia came to an end. What's that you say? There was no su
11:54 Popular
The Rise of the West and Historical Methodology: Crash Course World History #212

895 views / 2 likes - added 9 years ago

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of the West. And the
12:55 Popular
Asian Responses to Imperialism: Crash Course World History #213

801 views / 0 likes - added 9 years ago

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

1,137 views / 0 likes - added 9 years ago

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
13:28 Popular
Islam and Politics: Crash Course World History 216

1,109 views / 0 likes - added 9 years ago

In which John Green teaches you about how Islam has interacted with politics during it's history, and how it continues to do so today. Islamist movements are in the news a lot lately, but how did that happen. John will point out that Islam has alway been
11:44 Popular
The Mughal Empire and Historical Reputation: Crash Course World History #217

992 views / 0 likes - added 9 years ago

There's a new Crash Course poster with all your favorite World History characters! Czech it: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Mughal Empire, which ruled large swaths of the Indian Sub-
15:07 Popular
Luther and the Protestant Reformation: Crash Course World History #218

990 views / 3 likes - added 9 years ago

In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation, pretty much everyone in Europe was a Roman Catholic. Not to get all great man, but Martin Luther changed all that. Martin Luther didn't like the corrupt
11:02 Popular
World War II, A War for Resources: Crash Course World History #220

1,670 views / 11 likes - added 9 years ago

In which John Green teaches you about World War II, and some of the causes behind the war. In a lot of ways, WWII was about resources, and especially about food. The expansionist aggression of both Germany and Japan were in a lot of ways about resources.
12:53 Popular
Conflict in Israel and Palestine: Crash Course World History 223

859 views / 1 likes - added 9 years ago

In which John Green teaches you about conflict in Israel and Palestine. This conflict is often cast as a long-term beef going back thousands of years, and rooted in a clash between religions. Well, that's not quite true. What is true is that the conflict
11:18 Popular
The Vikings! - Crash Course World History 224

1,302 views / 5 likes - added 9 years ago

In which John Green teaches you about Vikings! That's right, one of our most requested subjects, the Vikings, right here on Crash Course. So what's the deal with Vikings? Well, the stuff you've heard about them may not be true. The Vikings weren't just pa
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Iran's Revolutions: Crash Course World History 226

751 views / 0 likes - added 9 years ago

In which John Green teaches you about Iran's Revolutions. Yes, revolutions plural. What was the1979 Iranian Revolution about? It turns out, Iran has a pretty long history of unrest in order to put power in the hands of the people, and the most recent revo
13:33 Popular
Japan in the Heian Period and Cultural History: Crash Course World History 227

1,307 views / 7 likes - added 9 years ago

In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy...in Japan. The Heian period in Japan lasted from 794CE to 1185CE, and it was an interesting time in Japan. Rather than being known for a thriving
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Homunculus - Crash Course Psychology #6

715 views / 0 likes - added 9 years ago

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09:34 Popular
Consciousness - Crash Course Psychology #8

1,097 views / 0 likes - added 9 years ago

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

1,311 views / 0 likes - added 9 years ago

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09:35 Popular
The Bobo Beatdown - Crash Course Psychology #12

842 views / 0 likes - added 9 years ago

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09:55 Popular
How We Make Memories - Crash Course Psychology #13

1,134 views / 0 likes - added 9 years ago

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10:18 Popular
Remembering and Forgetting - Crash Course Psychology #14

940 views / 1 likes - added 9 years ago

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10:42 Popular
Cognition: How Your Mind Can Amaze and Betray You - Crash Course Psychology #15

905 views / 1 likes - added 9 years ago

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10:02 Popular
Language: Crash Course Psychology #16

878 views / 0 likes - added 9 years ago

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

1,034 views / 0 likes - added 9 years ago

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11:38 Popular
Monkeys and Morality: Crash Course Psychology #19

843 views / 0 likes - added 9 years ago

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10:15 Popular
Adolescence: Crash Course Psychology #20

1,021 views / 0 likes - added 9 years ago

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11:08 Popular
Measuring Personality: Crash Course Psychology #22

1,031 views / 1 likes - added 9 years ago

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12:39 Popular
Controversy of Intelligence: Crash Course Psychology #23

992 views / 0 likes - added 9 years ago

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10:51 Popular
Feeling All the Feels: Crash Course Psychology #25

737 views / 2 likes - added 9 years ago

***Subbable Message*** To Robert, Thank you for showing me the world, darling! From Amy and That's happiness; to be dissolved into something complete and great. From Ty Scaletta ****** You can directly support Crash Course at http://www.subbable.com/crash
10:10 Popular
Psychological Disorders: Crash Course Psychology #28

871 views / 0 likes - added 9 years ago

***SUBBABLE MESSAGES*** To: Lola From: Daddy You are the best, I love you. *** To: Future Lia From: Mom and Dad Remember that learning isn't just useful, but also really fun! *** You can directly support Crash Course at http://www.subbable.com/crashcourse
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Schizophrenia&Dissociative Disorders: Crash Course Psychology #32

608 views / 0 likes - added 9 years ago

••• Subbable Message ••• To: Margarete From: Toni Your sister thinks you are the best! Here's hoping Crash Course does an Art History season just for you. :) ••• To get your own message in the dooblydoo, you can directly support Crash Course at http://www
11:09
Biomedical Treatments: Crash Course Psychology #36

685 views / 0 likes - added 9 years ago

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10:12 Popular
The Nucleus: Crash Course Chemistry #1

913 views / 1 likes - added 9 years ago

Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to f
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Unit Conversion&Significant Figures: Crash Course Chemistry #2

752 views / 0 likes - added 9 years ago

A unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. H
13:34 Popular
Water and Solutions -- for Dirty Laundry: Crash Course Chemistry #7

1,580 views / 0 likes - added 9 years ago

Dihydrogen monoxide (better know as water) is the key to nearly everything. It falls from the sky, makes up 60% of our bodies, and just about every chemical process related to life takes place with it or in it. Without it, none of the chemical reactions t
11:17 Popular
Acid-Base Reactions in Solution: Crash Course Chemistry #8

1,414 views / 0 likes - added 9 years ago

Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in those solutions - atoms reorganizing themselves to create whole new substances in the processes tha
11:31
Precipitation Reactions: Crash Course Chemistry #9

662 views / 0 likes - added 9 years ago

A lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what's called a precipitation reaction. In this episode of Crash Course
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Redox Reactions: Crash Course Chemistry #10

1,126 views / 0 likes - added 9 years ago

All the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from atom to atom, they c
11:45 Popular
Ideal Gas Problems: Crash Course Chemistry #13

921 views / 0 likes - added 9 years ago

We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our cul
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Real Gases: Crash Course Chemistry #14

570 views / 0 likes - added 9 years ago

Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren't all that constant; how the ideal gas law we've spent the past two weeks with has to be corrected for volume because atoms
11:26 Popular
Passing Gases: Effusion, Diffusion and the Velocity of a Gas - Crash Course Chemistry #16

1,285 views / 0 likes - added 9 years ago

We have learned over the past few weeks that gases have real-life constraints on how they move here in the non-ideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In this episode, Hank
11:24 Popular
Enthalpy: Crash Course Chemistry #18

1,128 views / 0 likes - added 9 years ago

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us - like that any bond between two atoms co
13:41 Popular
Entropy: Embrace the Chaos! Crash Course Chemistry #20

775 views / 0 likes - added 9 years ago

Life is chaos and the universe tends toward disorder. But why? If you think about it, there are only a few ways for things to be arranged in an organized manner, but there are nearly infinite other ways for those same things to be arranged. Simple rules o
09:46 Popular
Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22

945 views / 0 likes - added 9 years ago

Atoms are a lot like us - we call their relationships "bonds," and there are many different types. Each kind of atomic relationship requires a different type of energy, but they all do best when they settle into the lowest stress situation possible. The n
10:46 Popular
Polar&Non-Polar Molecules: Crash Course Chemistry #23

1,013 views / 1 likes - added 9 years ago

*** PLEASE WATCH WITH ANNOTATIONS ON! SOME INACCURACIES IN GRAPHICS ARE NOTED AND CORRECTED IN ANNOTATIONS. THANKS! *** Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and cate
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Solutions: Crash Course Chemistry #27

698 views / 0 likes - added 9 years ago

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. All that plus
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Equilibrium Equations: Crash Course Chemistry #29

736 views / 0 likes - added 9 years ago

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09:18 Popular
Doing Solids: Crash Course Chemistry #33

1,098 views / 0 likes - added 9 years ago

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09:27 Popular
Silicon - The Internet's Favorite Element: Crash Course Chemistry #35

1,291 views / 0 likes - added 9 years ago

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09:04 Popular
Electrochemistry: Crash Course Chemistry #36

1,484 views / 0 likes - added 9 years ago

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09:42 Popular
The History of Atomic Chemistry: Crash Course Chemistry #37

1,046 views / 0 likes - added 9 years ago

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09:50 Popular
Aromatics and Cyclic Compounds - Crash Course Chemistry #42

1,777 views / 0 likes - added 9 years ago

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09:05 Popular
Nomenclature - Crash Course Chemistry #44

1,358 views / 0 likes - added 9 years ago

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10:15 Popular
Polymers - Crash Course Chemistry #45

1,745 views / 0 likes - added 9 years ago

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11:20 Popular
The Black Legend, Native Americans, and Spaniards: Crash Course US History #1

912 views / 1 likes - added 9 years ago

In which John Green kicks off Crash Course US History! Why, you may ask, are we covering US History, and not more World History, or the history of some other country, or the very specific history of your home region? Well, the reasons are many. But, like
12:26 Popular
When is Thanksgiving? Colonizing America: Crash Course US History #2

881 views / 1 likes - added 9 years ago

In which John Green teaches you about the (English) colonies in what is now the United States. He covers the first permanent English colony at Jamestown, Virginia, the various theocracies in Massachusetts, the feudal kingdom in Maryland, and even a bit ab
11:38
The Quakers, the Dutch, and the Ladies: Crash Course US History #4

653 views / 2 likes - added 9 years ago

In which John Green teaches you about some of the colonies that were not in Virginia or Massachussetts. Old New York was once New Amsterdam. Why they changed it, I can say; ENGLISH people just liked it better that way, and when the English took New Amster
10:40 Popular
The Seven Years War and the Great Awakening: Crash Course US History #5

35.8k views / 308 likes - added 9 years ago

In which John Green teaches you about the beginnings of the American Revolution in a video titled The Seven Years War. Confusing? Maybe. John argues that the Seven Years War, which is often called the French and Indian War in the US, laid a lot of the gro
12:19 Popular
Taxes&Smuggling - Prelude to Revolution: Crash Course US History #6

819 views / 1 likes - added 9 years ago

In which John Green teaches you about the roots of the American Revolution. The Revolution did not start on July 4, 1776. The Revolutionary War didn't start on July 4 either. (as you remember, I'm sure, the Revolution and the Revolutionary War are not the
12:41 Popular
Who Won the American Revolution?: Crash Course US History #7

1,036 views / 1 likes - added 9 years ago

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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13:04 Popular
The Constitution, the Articles, and Federalism: Crash Course US History #8

1,069 views / 3 likes - added 9 years ago

In which John Green teaches you about the United States Constitution. During and after the American Revolutionary War, the government of the new country operated under the Articles of Confederation. While these Articles got the young nation through its wa
13:19 Popular
Thomas Jefferson&His Democracy: Crash Course US History #10

880 views / 3 likes - added 9 years ago

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 Popular
The Market Revolution: Crash Course US History #12

781 views / 0 likes - added 9 years ago

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
14:25 Popular
Slavery - Crash Course US History #13

1,120 views / 5 likes - added 9 years ago

In which John Green teaches you about America's "peculiar institution," slavery. I wouldn't really call it peculiar. I'd lean more toward horrifying and depressing institution, but nobody asked me. John will talk about what life was like for a slave in th
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Age of Jackson: Crash Course US History #14

943 views / 2 likes - added 9 years ago

In which John Green teaches you about the presidency of Andrew Jackson So how did a president with astoundingly bad fiscal policies end up on the $20 bill? That's a question we can't answer, but we can tell you how Jackson got to be president, and how he
13:11 Popular
Women in the 19th Century: Crash Course US History #16

1,149 views / 1 likes - added 9 years ago

In which John Green finally gets around to talking about some women's history. In the 19th Century, the United States was changing rapidly, as we noted in the recent Market Revolution and Reform Movements episodes. Things were also in a state of flux for
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War&Expansion: Crash Course US History #17

634 views / 0 likes - added 9 years ago

In which John Green teaches you about the Mexican-American War in the late 1840s, and the expansion of the United States into the western end of North America. In this episode of Crash Course, US territory finally reaches from the Atlantic coast to the Pa
14:17 Popular
The Election of 1860&the Road to Disunion: Crash Course US History #18

876 views / 1 likes - added 9 years ago

In which John Green teaches you about the election of 1860. As you may remember from last week, things were not great at this time in US history. The tensions between the North and South were rising, ultimately due to the single issue of slavery. The Nort
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The Civil War, Part I: Crash Course US History #20

1,289 views / 11 likes - added 9 years ago

In which John Green ACTUALLY teaches about the Civil War. In part one of our two part look at the US Civil War, John looks into the causes of the war, and the motivations of the individuals who went to war. The overarching causes and the individual motiva
05:28 Popular
History of the 4th of July: Crash Course US History Special

818 views / 3 likes - added 9 years ago

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
10:54 Popular
The Civil War Part 2: Crash Course US History #21

1,225 views / 6 likes - added 9 years ago

In which John Green teaches you how the Civil War played a large part in making the United States the country that it is today. He covers some of the key ways in which Abraham Lincoln influenced the outcome of the war, and how the lack of foreign interven
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Reconstruction and 1876: Crash Course US History #22

1,018 views / 1 likes - added 9 years ago

In which John Green teaches you about Reconstruction. After the divisive, destructive Civil War, Abraham Lincoln had a plan to reconcile the country and make it whole again. Then he got shot, Andrew Johnson took over, and the disagreements between Johnson
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The Industrial Economy: Crash Course US History #23

921 views / 0 likes - added 9 years ago

In which John Green teaches you about the Industrial Economy that arose in the United States after the Civil War. You know how when you're studying history, and you're reading along and everything seems safely in the past, and then BOOM you think, "Man, t
12:45 Popular
Growth, Cities, and Immigration: Crash Course US History #25

1,247 views / 2 likes - added 9 years ago

In which John Green teaches you about the massive immigration to the United States during the late 19th and early 20th century. Immigrants flocked to the US from all over the world in this time period. Millions of Europeans moved to the US where they drov
13:51 Popular
Gilded Age Politics:Crash Course US History #26

790 views / 0 likes - added 9 years ago

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The Progressive Era: Crash Course US History #27

898 views / 1 likes - added 9 years ago

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14:04 Popular
American Imperialism: Crash Course US History #28

1,375 views / 0 likes - added 9 years ago

In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young country was especially
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Progressive Presidents: Crash Course US History #29

727 views / 1 likes - added 9 years ago

In which John Green teaches you about the Progressive Presidents, who are not a super-group of former presidents who create complicated, symphonic, rock soundscapes that transport you into a fantasy fugue state. Although that would be awesome. The preside
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America in World War I: Crash Course US History #30

894 views / 2 likes - added 9 years ago

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14:27 Popular
The Great Depression: Crash Course US History #33

1,866 views / 7 likes - added 9 years ago

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13:27 Popular
World War II Part 1: Crash Course US History #35

1,484 views / 6 likes - added 9 years ago

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13:35 Popular
The Cold War: Crash Course US History #37

916 views / 3 likes - added 9 years ago

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
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The Cold War in Asia: Crash Course US History #38

950 views / 1 likes - added 9 years ago

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The 1960s in America: Crash Course US History #40

910 views / 0 likes - added 9 years ago

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14:51 Popular
The Rise of Conservatism: Crash Course US History #41

702 views / 0 likes - added 9 years ago

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

653 views / 0 likes - added 9 years ago

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

952 views / 2 likes - added 9 years ago

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15:38 Popular
The Clinton Years, or the 1990s: Crash Course US History #45

913 views / 1 likes - added 9 years ago

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15:27 Popular
Terrorism, War, and Bush 43: Crash Course US History #46

854 views / 0 likes - added 9 years ago

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15:40 Popular
Obamanation: Crash Course US History #47

764 views / 0 likes - added 9 years ago

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How and Why We Read: Crash Course English Literature #1

1,120 views / 2 likes - added 9 years ago

In which John Green kicks off the Crash Course Literature mini series with a reasonable set of questions. Why do we read? What's the point of reading critically. John will argue that reading is about effectively communicating with other people. Unlike a d
12:42 Popular
Of Pentameter&Bear Baiting - Romeo&Juliet Part I: Crash Course English Literature #2

711 views / 0 likes - added 9 years ago

In which John Green examines Romeo&Juliet by William Shakespeare. John delves into the world of Bill Shakespeare's famous star-crossed lovers and examines what the play is about, its structure, and the context in which it was written. Have you ever wanted
10:52
Language, Voice, and Holden Caulfield: The Catcher in the Rye Part 1

652 views / 0 likes - added 9 years ago

In which John Green examines JD Salinger's novel The Catcher in the Rye. John pulls out the old school literary criticism by examining the text itself rather than paying attention to the biographical or historical context of the novel (that's for next wee
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12:07 Popular
A Long and Difficult Journey, or The Odyssey: Crash Course Literature 201

748 views / 1 likes - added 9 years ago

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
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Fate, Family, and Oedipus Rex: Crash Course Literature 202

788 views / 1 likes - added 9 years ago

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

850 views / 1 likes - added 9 years ago

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Don't Reanimate Corpses! Frankenstein Part 1: Crash Course Literature 205

1,019 views / 2 likes - added 9 years ago

In which John Green teaches you about Mary Shelley's novel, Frankenstein. Sure, you know Frankenstein the cultural phenomenon, but how much do you know about the novel that started it all? You'll learn about the Romantic movement in English lit, of which
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Reader, it's Jane Eyre - Crash Course Literature 207

769 views / 2 likes - added 9 years ago

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716 views / 0 likes - added 9 years ago

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724 views / 1 likes - added 9 years ago

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Langston Hughes&the Harlem Renaissance: Crash Course Literature 215

860 views / 3 likes - added 9 years ago

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That's Why Carbon Is A Tramp: Crash Course Biology #1

1,429 views / 0 likes - added 9 years ago

And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all containe
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Biological Molecules - You Are What You Eat: Crash Course Biology #3

1,528 views / 0 likes - added 9 years ago

Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCou
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Eukaryopolis - The City of Animal Cells: Crash Course Biology #4

1,091 views / 0 likes - added 9 years ago

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
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DNA Structure and Replication: Crash Course Biology #10

1,182 views / 0 likes - added 9 years ago

Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series
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Cell Meiosis: Crash Course Biology #13

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Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Compl
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Animal Development: We're Just Tubes - Crash Course Biology #16

863 views / 0 likes - added 9 years ago

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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The Nervous System - CrashCourse Biology #26

2,253 views / 1 likes - added 9 years ago

Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse on Facebook: http://www.face
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The Skeletal System: It's ALIVE! - CrashCourse Biology #30

1,289 views / 1 likes - added 9 years ago

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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Big Guns: The Muscular System - CrashCourse Biology #31

1,768 views / 1 likes - added 9 years ago

Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse: http://www.facebook.com/YouTubeCrashCourse Follow CrashCo

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