Jessi got a nose bleed while playing outside. In order to make it less scary, Jessi and Squeaks explain why they happen, and how to take care of them.

Kaki King, the first female on Rolling Stone's "guitar god" list, rocks out to a full live set at TED2008, including her breakout single, "Playing with Pink Noise." Jaw-dropping virtuosity meets a guitar technique that truly stands out.

Day by day, country by country, we tend to measure seasons differently.

Iranian-born artist Shirin Neshat explores the paradox of being an artist in exile: a voice for her people, but unable to go home. In her work, she explores Iran pre- and post-Islamic Revolution, tracing political and societal change...

In an infectiously joyous talk, Milk Bar founder Christina Tosi shares the sugary jolt of her first food memory and behind-the-scenes stories of her bakery's famously inventive cakes, cookies and treats. This talk may make you hungry --...

Quantum tunneling happens when a particle seemingly teleports across a barrier. But despite how instantaneous this event sounds, recent research suggests that it doesn’t happen nearly as fast as you might think.

Around 750-1250 CE, the Islamic empire made incredible scientific advancements that still influence many fields of research today. What we know about some of the great minds of that time, as well as what we’ve learned from modern...

In which John Green investigates the dawn of human civilization. John looks into how people gave up hunting and gathering to become agriculturalists, and how that change has influenced the world we live in today. Also, there are some...

Just because something is difficult doesn't mean it's impossible. Over the past centuries, archaeologists, historians, and engineers have reconstructed a great deal of the technology and science used to build the Egyptian pyramids. This...

Farming erodes soil 50 times faster than it forms. We can change that, but will we?

The world is a living tapestry ... As the weave of life is torn apart in one place, the threads unravel in another, says author and physics professor Vandana Singh, acknowledging humanity's interconnectedness with the planet -- and the...

When Dick Fosbury couldn't compete against the skilled high jumpers at his college, he tried jumping in a different way -- backwards. Fosbury improved his record immediately and continued to amaze the world with his new technique all the...

Organisms have evolved many clever forms of armor so that they can be ready for whatever nature throws at them. And us flimsy humans can learn to enhance our armor by taking inspiration from some of these creatures, and not necessarily...

Nalini Nadkarni challenges our perspective on trees and prisons -- she says both can be more dynamic than we think. Through a partnership with the state of Washington, she brings science classes and conservation programs to inmates, with...

Discover 5 key chemicals that we use to make our food taste the way it's supposed to taste, look the way we expect it to look, and generally survive the journey to our tables intact.

Why is J.R.R. Tolkien's Lord of the Rings trilogy so compelling? How about The Matrix or Harry Potter? What makes these disparate worlds come alive are clear, consistent rules for how people, societies -- and even the laws of physics --...

Formally or informally, human societies across place and time have made rules to bind and dissolve couples. The stakes of who can obtain a divorce, and why, have always been high. Divorce is a battlefield for some of society's most...

While many researchers are focusing on finding a difference in brains of people with dyslexia, some new research suggests it might not just be in their brains, but in their eyes.

Water doesn't always freeze when it's supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly!

What's black and white, big and fuzzy, and likes to eat bamboo all day? A panda! Join us to learn all about this rare bears and the challenges they face as their habitat disappears.

When the Cold Atom Laboratory launches to the International Space Station in 2016, it will become the coldest spot in the universe. Learn how scientists are going to get closer than ever to absolute zero -- and why they want to.

Scientists have once again used big, complex math equations to help us understand more about the universe we inhabit, this time about the origins of life on earth.

Have you ever turned on a faucet in your sink or shower and wondered where that water comes from? Jessi and Squeaks explore how we get water to our homes!

If Yoda goes into cardiac arrest, will you know what to do? Artist and first-aid enthusiast Todd Scott breaks down what you need to know about using an automated external defibrillator, or AeD -- in this galaxy and ones that are far, far...