For most living things the color you see when you look at them is determined by pigments. But some of the most vivid colors we see in nature get their signature looks WITHOUT colorful molecules. How do these intense colors get their power?

The chemistry behind film photography is pretty fascinating. How do film cameras help us turn light into a physical image?

Most of us are hoping that any nuclear threats are just empty threats, and getting at the facts about ICBMs can be difficult. But what would actually happen if someone launched a nuclear weapon?

For most living things the color you see when you look at them is determined by pigments. But some of the most vivid colors we see in nature get their signature looks WITHOUT colorful molecules. How do these intense colors get their power?

Mark Shaw demos Ultra-Ever Dry, a liquid-repellent coating that acts as an astonishingly powerful shield against water and water-based materials. At the nano level, the spray covers a surface with an umbrella of air so that water bounces...

Poet Rives does 8 minutes of lyrical origami, folding history into a series of coincidences surrounding that most surreal of hours, 4 o'clock in the morning.

Everyone is watching the sky during a solar eclipse, but but if you look down, you'll catch another kind of light show.

Deep into the ocean even the slightest glimmer give you away. Which is why some fish have evolved to be so dark that they absorb any light that hits them.

Today we're talking about the blackest material ever created!

Most of us are hoping that any nuclear threats are just empty threats, and getting at the facts about ICBMs can be difficult. But what would actually happen if someone launched a nuclear weapon?

Speaking one month after the massive Gulf of Mexico oil spill, Lisa Margonelli shows how drilling moratoriums and executive ousters make for good theater, but distract us from the issue at heart: our unrestrained oil consumption. She...

After years of war, the world’s kingdoms have come to an agreement. Every five years, teams representing the elves, goblins, and treefolk will compete in a grand tournament of dragon jousting. You have the important job of recording the...

That asteroid the headlines have been warning people about isn't likely to actually hit us, and scientists might have solved a mystery that could save lives: the relationship between tides and earthquakes.

It’s not like anyone thought head injuries were good for people, but the long term effects of concussions has researchers, coaches, and doctors concerned about the extra risks of some popular sports.

How does a city become known as a "music city"? Publicist Elizabeth Cawein explains how thriving music scenes make cities healthier and happier and shares ideas for bolstering your local music scene -- and showing off your city's talent...

Where does creative inspiration spring from? At TEDIndia, Hollywood/Bollywood director Shekhar Kapur ("Elizabeth," "Mr. India") pinpoints his source of creativity: sheer, utter panic. He shares a powerful way to unleash your inner...

After a long day working on the particle accelerator, you and your friends head to the arcade to unwind. The lights go out for a second, and when they come back, there before you gleams a foosball table. Always game, you insert your...

Quick, think of three words to describe yourself. TIME'S UP! What did you think of? Chances are you thought of descriptive words that we call Properties. In this episode of Crash Course Kids, Sabrina talks about how properties help us...

Mr. Andersen introduces the concept of waves. Both transverse and logitudinal waves are described. The relationship between wave speed, wave frequency and wavelength is also included.

It's kinda embarrassing when you spill stuff on your shirt and it makes a stain. So you might as well understand the science behind it, so at least you can act all smart and explain it to people.

If you’ve been brave enough to open your eyes underwater, you might have noticed that everything is blurry. But fish have no trouble finding their way beneath the waves. So why can’t we see as clearly below as we do above?

Jessi and Squeaks love watching clouds and birds fly way up in the sky! But why is the sky blue?

Remember Sol, the closest star to Earth? We like to call it The Sun and we haven't talked about it in a little while. One interesting thing about the energy we get from the sun is that it's not absorbed the same way by different...

In this video Paul Andersen explains how waves interact with objects and with other waves. When a wave hits a fixed object it will be reflected and inverted. When a wave hits a free object it will be reflected without being inverted. ...