Earlier this year, fidget spinners claimed their place as the hot new fad of 2017. Some people, however, claim that fidget toys could help people manage symptoms of anxiety and ADHD.

In this video Paul Andersen explains that entropy is simply the dispersion of matter or energy. He begins with a series of video that show the natural direction of processes. According to the second law of thermodynamics the entropy...

Explore how the Women’s Suffrage Parade on Washington in 1913 helped women secure the right to vote in the United States through the 19th amendment. -- On March 3, 1913, after months of strategic planning and controversy, thousands...

In this video Paul Andersen explains how all objects contain positive and negative charge. Neutral objects contain an equal amount of positive and negative charges. Charged objects have more positive or negative charges. Like charges...

What IS Angular Momentum?

Have you ever wondered how animals can live in super cold places all the time? Jessi shows you how some cool animals like whales, polar bears, and penguins, keep warm!

Your interstellar police squad has tracked a group of criminals to a cluster of seven planets. Now you must apprehend them before their reinforcements arrive. Of course, the fugitives won't just stay put _ they'll try to dodge you by...

People often think of perfectionism as a good thing, but it’s more than just a strong desire to do something well, and it can actually be a risk factor for several clinical disorders.

The previous videos in this series:

Chapter 1: Why Relativity is
Hard
Chapter 2: Spacetime

Diagrams

This video is chapter 3 in my series on special relativity, and it covers boosts, galilean transformations,...

The future is bright for those of you who want to be asteroid miners! You might soon get your chance!

What has the highest melting point known to us? Hank Green explains in this episode of SciShow.

So you know what a star is, right? Well, if you don't, you should. We've talked about that big one in the sky a few times: The Sun! But there are a lot of bright dots in the night sky and not all of them are stars. Today, let's play a...

In this video Paul Andersen describes some of the properties of electromagnetic radiation. The electromagnetic spectrum varies by wavelength from radio waves to gamma rays. We only see a portion of the spectrum known as visible light. ...

Today we're going to talk about how and why floods happen both in spite of, and because of, us. Specifically, we'll take a closer look at the island of Java, and its largest city, Jakarta, and explain the factors that lead to serious...

Pollination: it's vital to life on Earth, but largely unseen by the human eye. Filmmaker Louie Schwartzberg shows us the intricate world of pollen and pollinators with gorgeous high-speed images from his film "Wings of Life," inspired by...

Like it or not, the ground you’re walking on is always on the move! Join Jessi and Squeaks to learn how this movement can sometimes lead to earthquakes!

There's something surprising that helps determine how damaging a disease is: distance.

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To learn more, start your googling with t
hese keywords:...

Tribology: it's a funny-sounding word you might not have heard before, but it could change how you see and interact with the physical world, says mechanical engineer Jennifer Vail. Offering lessons from tribology -- the study of friction...

Paul Andersen explains how signal transmission is used to alter both cellular function and gene expression. He uses the example of epinephrine release in humans and how it is used in the fight or flight response. Epinephrine causes...

Paul Andersen starts with a brief description of diffusion and osmosis. He then describes the diffusion demonstration and how molecules move over time. He then explains the concepts behind the osmosis lab and how potatoes are affected...

In this, THE FIRST EPISODE of Crash Course Physics, your host Dr. Shini Somara introduces us to the ideas of motion in a straight line. She talks about displacement, acceleration, time, velocity, and the definition of acceleration. Also,...

According to Newton's law of gravitation, the sun should "pull" way harder on the moon than the Earth does. So does the moon actually orbit the Earth? Why?

Our bodies _ the physical, biological parts of us - and our minds - the thinking, conscious aspects - have a complicated, tangled relationship. Which one primarily defines you or your self? Are you a body with a mind or a mind with a...

In this video Paul Andersen explains how energy can enter and leave a system. The amount of energy a substance can receive through heating or lose through cooling is measured using the specific heat capacity. Phase changing energy from...