Did you know that all living things change their environments? It's true. Beavers, deer, worms, and humans all change their environments. It just so happens that humans change our environments in big, obvious ways. In this episode,...

12,000 years ago, the earth was very different, and so were some of the animals living on it! Here are 5 giants creatures you might have seen back then.

The most common type of exoplanets might be worlds like our ice giant, Uranus. Understanding it could be key to the history of planets all over the galaxy.

Profit, money, shareholders: these are the priorities of most companies today. But at what cost? In an appeal to corporate leaders worldwide, Chobani founder Hamdi Ulukaya calls for an end to the business playbook of the past -- and...

Author Steven Johnson takes us on a 10-minute tour of The Ghost Map, his book about a cholera outbreak in 1854 London and the impact it had on science, cities and modern society.

Can architects re-engineer their design process? Joshua Prince-Ramus shows how the results can be spectacular. He walks us through his fantastic re-creation of the Wyly Theater as a giant "theatrical machine" that reconfigures itself at...

What would happen if we could generate power from our windowpanes? In this moving talk, entrepreneur Justin Hall-Tipping shows the materials that could make that possible, and how questioning our notion of 'normal' can lead to...

What do you do when your firmly held beliefs turn out not to be true? When Casey Gerald's religion failed him, he searched for something new to believe in -- in business, in government, in philanthropy -- but found only false saviors. In...

Today Hank talks with Vanessa Hill of BrainCraft about being an educational YouTuber, and how to use science to be better, and Jessi brings Cayenne the Patagonian cavy and Pumpkin the guinea pig in for a visit.

Emily Graslie of The Brain Scoop is back again to stump Hank and to tell us about some fascinating new research in the field of rat telepathy (NO JOKE). Then Jessi from Animal Wonders shares Zoe the Red-lored Amazon parrot.

We decided it would be cool to have guests come into the studio and talk about science with Hank.

Emily Graslie of the Brain Scoop is back again with some more skulls to stump Hank, and Jessi from Animal Wonders brings in Blueberry the blue-tongued skink.

Bees have been rapidly and mysteriously disappearing from rural areas, with grave implications for agriculture. But bees seem to flourish in urban environments -- and cities need their help, too. Noah Wilson-Rich suggests that urban...

As many as 3,000 languages could disappear within the next 80 years, all but silencing entire cultures. In this quick talk, language activist Daniel Bögre Udell shows how people around the world are finding new ways to revive ancestral...

In which John Green teaches you about the Cold War, which was occasionally hot, but on average, it was just cool. In the sense of its temperature. It was by no means cool, man. After World War II, there were basically two big...

Are insects the key to brain-inspired computing? Neuroscientist Frances S. Chance thinks so. In this buzzy talk, she shares examples of the incredible capabilities of insects -- like the dragonfly's deadly accurate hunting skills and the...

Today, cosmic rays are used to understand things like supernovas, but in the early 1900s, they helped us discover brand-new subatomic particles long before the first accelerators.

How do adult strawberry poison frogs pass on toxins to their tadpoles? What happens when scientists add iodine to axolotl tanks? Find out, as our How To Adult hosts Rachel Calderon-Navarro, Project Manager at DFTBA, and Hank Green face...

From the Archean Eon to the Holocene Epoch, check out this SciShow mini-series for a primer about life on earth.

Twenty-three Grand Slam titles later, tennis superstar Serena Williams sits down with journalist Gayle King to share a warm, mischievous conversation about her life, love, wins and losses -- starting with the story of how she...

Jonathan Harris wants to make sense of the emotional world of the Web. With deep compassion for the human condition, his projects troll the Internet to find out what we're all feeling and looking for.

Hector Ruiz, the executive chair of AMD, wants to give Internet access to everyone. In this talk, he shares his extraordinary life story and describes AMD's 50x15 initiative that calls for connecting 50 percent of the world by 2015.

Vaccine-autism claims, "Frankenfood" bans, the herbal cure craze: All point to the public's growing fear (and, often, outright denial) of science and reason, says Michael Specter. He warns the trend spells disaster for human progress.

Cameron Russell admits she won "a genetic lottery": she's tall, pretty and an underwear model. But don't judge her by her looks. In this fearless talk, she takes a wry look at the industry that had her looking highly seductive at barely...