Creating functional prosthetics at a fraction of the cost of imported tech, bionic innovator and TED Fellow Enzo Romero shares a groundbreaking model for designing 3D-printed assistive technology sourced from recycled materials -- built...

How counting in Ternary can solve a variant of the Tower's of Hanoi puzzle, and how this gives rise to a beautiful connection to Sierpinski's triangle.

In this video Paul Andersen explains how a rotating system will have several quantities; including torque, angular velocity, angular acceleration and angular momentum. Each of these quantities have a vector property that can be...

Einstein predicted their existence 101 years ago, and now it's official: we've detected gravitational waves directly for the first time ever!

You know how you somehow end up getting smoke in your eyes wherever you stand around a bonfire? Well, it turns out that’s not a curse! It’s much more easily explained with physics. "The more protractors, the better the party." ~Hank Green

We all know that many planets have moons orbiting them, but is it possible for those moons have little moons of their own?

One of the hardest places to explore in space is actually pretty close, some call it the ignorosphere.

Sitting down for brief periods can help us recover from stress or recuperate from exercise. But nowadays, our lifestyles make us sit much more than we move around. Are our bodies built for such a sedentary existence? Murat Dalkilin�c...

Join Squeaks for one of his favorite episodes all about RATS! You'll get to play a few rounds of true or false to learn some interesting facts about these furry creatures!

It's time to heat things up! LITERALLY! It's time for Hank to talk about the history of Thermodynamics!!! It's messy and there are a lot of people who came up with some ideas that worked and other that didn't and then some ideas that...

Your brain is lying to you about what you see-- find out why in this Quick Question!

CubeSats have a lot of advantages, but they need a way to move and still stay small, and that means new miniaturized propulsion systems that can help us get these tiny spacecraft out into the universe.

Phil starts the planet-by-planet tour of the solar system right here at home, Earth.

If you stick your finger in a socket, you’re in for a bad time, so how can birds perch on power lines without getting zapped?

Jessi's in the lab, mixing up something kind of strange: Oobleck! Come find out all about this goo that can be a solid and a liquid at the same time, and then learn how to make some for yourself!

The immense swell of a tsunami can grow up to 100 feet, hitting speeds over 500 mph -- a treacherous combination for anyone or anything in its path. Alex Gendler details the causes of these towering terrors and explains how scientists...

In the future, we may see more continent-sized dust storms like the one nicknamed Godzilla, which crossed the Atlantic ocean in 2020. And since then, researchers have been looking into what caused such a colossal storm. If we can predict...

Amyotrophic Lateral Sclerosis (ALS), also called motor neuron disease and Lou Gehrig's Disease, affects about two out of every 100,000 people worldwide. When a person has ALS, their motor neurons - the cells responsible for all voluntary...

In this video Paul Andersen explains how the magnetic permeability is the ability of a material to form internal magnetic fields. The magnetic permeability of free space is a constant and is much lower than the magnetic permeability of...

In this video Paul Andersen explains how the electric field strength decreases as the square of the radius as you move away from a point charge, or a uniform distribution of charge on a sphere. This is a direct application of Coulomb's...

The world changes. It really does! But sometimes it changes so slowly that we don't notice it. Other times it changes REALLY FAST!!! In this episode of Crash Course Kids, Sabrina talks about some of the reasons things can change quickly...

Despite the rise of renewable energy, the backbone of the power grid is fossil fuels. Adapting the grid to green energy sources is more complicated than flipping a switch.

In this video Paul Andersen explains how heating is the transfer of energy (heat) from a warmer object to a cooler object. Heat can be transferred through conduction, convection and radiation. At the microscopic level conduction...

Do you know how many people have been to the moon? Only 12! Part of the reason it's so few is because of how difficult it is to escape Earth and get into space in the first place. In this episode of Crash Course Kids, Sabrina talks about...