On Olympus, you've been waiting for an opportunity to bring the bloody Trojan War to its conclusion. The two sides have agreed to a brief truce, and when you consult the Fates, they advise: should the peace last for 10 days, all will end...

What are air currents? Air currents are like rivers of wind caused by areas of high and low pressure.The air above the land is warmer and less dense, so it rises. The air over the water is cooler and heavier. The cool air rushes in...

In this video Paul Andersen explains how rock is formed and changed on the planet. The video begins with a brief description of rocks, minerals, and the rock cycle. Plate tectonics is used to describe structure near plate boundaries. ...

While you unwrap that luscious truffle, let Hank explain the science of chocolate -- where it comes from, what its active ingredient is, and how it works. Also learn the difference between chocolate, cocoa, cacao and coca, so you really...

Astronomers still aren't sure about how our solar system might have formed, but they have simulations to help them get closer to the answer!

In this video Paul Andersen explains how matter, like light, can be treated as both a particle and a wave. Louis de Broglie proposed that matter could act as a wave and described the wavelength of matter as a function of Planck's...

Want to learn how plants move water around inside them? Or do you just want to turn a stalk of celery purple? Then try our amazing color-changing celery experiment, in class or at home!

Jessi and Squeaks just got a new telescope, and they can't wait to check out the night sky! But there's just one problem: it's too heavy to bring up the stairs into the observatory! Join them as they learn about a simple machine that can...

Jessi and Squeaks want to learn more about the inside of a pumpkin. How? By dissecting it!

Don't you think it would be nice if you had a photographic memory? But is it actually a thing?

In this video Paul Andersen compares and contrasts transverse and longitudinal waves. Waves carry energy through oscillations. In transverse waves the oscillations are perpendicular to the direction of the wave and in longitudinal they...

Let's say you're looking for a specific constellation in the sky, but can't find it? That could be because you're on the wrong part of the planet to see it. In this episode of Crash Course Kids, Sabrina talks about how the Earth's...

In this video Paul Andersen explains the vital role that water plays in the processes on the Earth's surface. Water has several unique properties including high heat capacity, transparency, polarity and the ability to change the...

Paul Andersen introduces Anatomy and Physiology in this podcast. He starts by describing how the form of an object fits the function. He then explains the themes of homeostasis and hierarchy. He describes the four major types of tissues;...

In this talk from TED University 2009, veteran rock climber Matthew Childs shares nine pointers for rock climbing. These handy tips bear on an effective life at sea level, too.

You’re doing everything right at work, taking all the right advice, but you’re just not moving up. Why? Susan Colantuono shares a simple, surprising piece of advice you might not have heard before quite so plainly. This talk, while aimed...

In this video Paul Andersen explains how humans are impacting the Earth through farming, mining, pollution and climate change. According to the NGSS wise management can reduce impacts on the planet. This will become more important as...

In today's episode, Phil looks at how gravity plays out across the universe.

In this video Paul Andersen explains the parts of the Solar System; including the planets, dwarf planets, moons and asteroids. He explains how everything orbits around the Sun and how a proper understanding of this heliocentric model...

What style of animation perfectly mimics the movement of zombies? Puppet animation allows for just the right amount of zombie-like stiff limbs and jerky stumbles. TED-Ed animators show how to bring a zombie to life through 2D puppet...

In this video Paul Andersen explains how science is dependent upon engineering which is dependent upon science which is dependent up engineering which is dependent upon science which is dependent up engineering which is dependent upon...

In this video Paul Andersen outlines the AP Environmental Science course. He explains how environmental science studies the interaction between earth and human systems. A planetary boundary model is used to explain the importance of...

Today we're going to take a hike up Mt. Kilimanjaro so we can talk about how the geosphere changes based on many different things. On the same mountain we can travel through many different habitats like rain forests, savannas, and...

Paul Andersen shows how homeostasis reflects of evolution through time. The endocrine system shows continuity through flatworms, earthworms and vertebrates. However the respiratory system shows change as organisms move onto land. The...