In a zippy demo at TED U, AnnMarie Thomas shows how two different kinds of homemade play dough can be used to demonstrate electrical properties -- by lighting up LEDs, spinning motors, and turning little kids into circuit designers.

In 1967, a star was discovered that seemed to be different than most stars, . . . it looked like it was blinking.

Is it in the Arctic Ocean? In Canada? Russia?

"How fast are you moving?" seems like an easy question, but it's actually quite complicated -- and perhaps best answered by another question: "Relative to what?" Even when you think you're standing still, the Earth is moving relative to...

In the video Paul Andersen explains how Bernoulli's Equation describes the conservation of energy in a fluid. The equation describes the pressure energy, potential energy, and kinetic energy of a fluid at a single point. A sample...

Three Simple Ways to Time Travel

We've talked about a lot of revolutions in 19th Century Europe, and today we're moving on to a less warlike revolution, the Industrial Revolution. You'll learn about the development of steam power and mechanization, and the labor and...

Plot often trumps reality when portraying space in movies and, as a result, many films are full of inaccuracies. So how much fiction is actually written into some of our favorite movies? Movies mentioned (and potentially spoiled) in this...

So, have you ever wondered why we have seasons? Or maybe where the sun goes when it's night time? *Hint: It doesn't actually go anywhere* In this episode of Crash Course Kids, Sabrina talks about the Earth's rotation and revolution and...

Your brain does its best to inform you about the world around you, but sometimes it gets tricked. Enjoy eight optical illusions to test your brain's sensory input.

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...

Jessi and Squeaks use the power of the sun to conduct a cool science experiment!

Have you ever noticed the moon hanging out in the daytime sky and wondered why? Join Jessi and Squeaks to find out!

In this video Paul Andersen explains how energy can neither be created nor destroyed but may be transferred. Energy comes in many forms (including chemical, mechanical, light, electrical, and thermal). In AP Chemistry students must be...

science kids seasons V1-0001

In this educational video transcript, students learn about the Earth's orbit around the Sun, its axis, and how these factors contribute to the changing of seasons. The video explains how the tilt of the...

Howcast - The dreidel, the small top that's among the most recognizable symbols of the Hanukkah season, is a fun game of chance to play with friends and family.

Howcast - Learn how to do the b-boy trick the air glide aka the gremlin or flagpole from choreographer Victor "Kid Glyde" Alicea in this Howcast breakdancing tutorial.

Howcast - Halloween just around the corner and you still got nothing? Check out these easy last-minute costumes.

Howcast - Learn how to do a burnout in this Howcast motorcycle video with expert Kenyon Kluge.

Howcast - Learn how to find a great wedding DJ from celebrity wedding planner Barbara Esses in this Howcast video.

Howcast - Learn about spinning during pregnancy from fitness expert Cait Morth in this Howcast workout video.

Howcast - Learn how to clean skateboard bearings from SHUT Skateboards' Michael A. Cohen in this Howcast video.

Howcast - Learn techniques to take the back from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video, part two of two.

Howcast - Learn the Bo Furi Gata, part of Bojutsu training, from Sensei Oliver Martin in this Howcast ninjutsu video.