Which is the most intense Olympic throwing event? Shot put? Hammer? Discus? Javelin?

How Modern Light Bulbs Work

Get to know plasma, the most common, but probably least understood, phase of matter in the universe!

Researchers have identified the processes that cause gray hair and have done experiments to reverse it. And believe it or not, we've had some of these options for decades.

Dogs are humanity’s go-to friend when it comes to super sniffers, but here are 6 other creatures that give puppers a run for their money.

What's a proven way to lower your energy costs? Would you believe: learning what your neighbor pays. Alex Laskey shows how a quirk of human behavior can make us all better, wiser energy users, with lower bills to prove it.

In this video Paul Andersen shows conceptual thinking in a mini-lesson on energy and energy transfer.


TERMS
Energy - the ability to ca
use change
Object - a material thing that can be s
een and touched
Transfer -...

There’s lots of debate as to which original starter Pokémon is the best fighter among squirtle, bulbasaur, charmander, and pikachu, but only one is the most biologically plausible.

Starting with four basic questions (that you may be surprised to find you can't answer), Jonathan Drori looks at the gaps in our knowledge -- and specifically, what we don't about science that we might think we do.

Which is the most intense Olympic throwing event? Shot put? Hammer? Discus? Javelin?

Join Hank Green as he explains why blacklights make some things glow!

Batteries power much of your daily life, so today we're going to talk about how they work. We're also explaining how terminal voltage results from the natural internal resistance of every real battery. We'll get into both series and...

Having the ability to dim your lights seems like a pretty simple thing, but modern dimmer switches work in a surprisingly cool way!

How Modern Light Bulbs Work

Get to know plasma, the most common, but probably least understood, phase of matter in the universe!

Mr. Andersen introduces the topic of electricity. He differentiates between static electricity and current electricity. An introduction to electric circuits is also included.

Have you ever wondered how you can turn the light on in your house? Or maybe why you can push a doorbell and it makes a sound? This happens because of circuits! Join Jessi and Squeaks as they learn how circuits work, and make their very...

Mr. Andersen contrasts series and parallel electrical circuits. A simulation is used to visualize electron flow through both circuit types.

Thomas Edison is remembered as one of America’s greatest inventors—but his path to success was filled with failure. Before the light bulb worked, it failed over 1,000 times. His early businesses struggled, and some of his inventions...

Howcast - A flickering light isn't just annoying; it can be dangerous. Learn how to fix the problem.

Howcast - Lose your light? Here's how to replace a fading or burnt-out headlight.

Howcast - Learn the difference between LED and CFL lightbulbs in this Howcast video featuring Alegre of Green and Greener.

Howcast - Use this safe and easy technique next time you need to replace a shattered light bulb.

Howcast - Broken light bulb stuck in the socket? Cut a raw baking potato in half, disconnect the power, push the potato into the socket, and twist it counterclockwise; the bulb will come right out, shards and all. Bright idea!