Science fiction writer Monica Byrne imagines rich worlds populated with characters who defy our racial, social and gender stereotypes. In this performance, Byrne appears as a hologram named Pilar, transmitting a story of love and loss...

Do birds have a dominant foot? #shorts #science #SciShow

Ecologist Lian Pin Koh makes a persuasive case for using drones to protect the world's forests and wildlife. These lightweight autonomous flying vehicles can track animals in their natural habitat, monitor the health of rainforests, even...

Engineering student Péter Fankhauser demonstrates Rezero, a robot that balances on a ball. Designed and built by students, Rezero is the first ballbot made to move quickly and gracefully -- and even dance. (Could the Star Wars sphere...

A freshly-mopped floor is slippery, but a wet shirt is super-clingy... so what's the deal? Why can water make some things slick and other things sticky?

Imagine being by yourself in the dead center of a 3,000-foot vertical cliff -- without a rope to catch you if you fall. For professional rock climber Alex Honnold, this dizzying scene marked the culmination of a decade-long dream. In a...

Maybe you'd like to just hear about one topic for a while. We understand. Thus, we've created our Compilation Series. In this video, we look at some of our videos about Space. Sabrina talks to us about the Sun, stars, the universe, and...

In the third act of "Swan Lake", the Black Swan pulls off a seemingly endless series of turns, bobbing up and down on one pointed foot and spinning around and around and around thirty-two times. How is this move - which is called a...

Jessi and Squeaks love to build things, and they love to learn how to make the things they build even better! Join them today to learn how engineering can help make anything, from a tower of cups to a giant sky scraper, more stable!

Hank tackles another one of the internet's most-asked questions: What makes feet stink? And maybe more importantly, why do they sometimes smell like ... snack food?

It is now time to meet the system that helps your crazy brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and...

Fossilized footprints have proved that human ancestors were already striding across the landscape 3.6 million years ago. But who started them on that path? What species pioneered this style of locomotion? Who was the first to walk?

From turf toe to toxic Zamboni's, sports injuries aren't just for pro athletes.

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.

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex...

Jessi and Squeaks look at some amazing creatures that they found in their garden: snails and slugs!

Jessi and Squeaks show you how a tiny seed, like the kind you eat in your trail mix! Grows into a big plant!

In this talk from TED University 2009, veteran rock climber Matthew Childs shares nine pointers for rock climbing. These handy tips bear on an effective life at sea level, too.

It might be possible to run on water, as long as you're not on earth.

Down here, on Earth, if you look up at the night sky, it seems like all the stars up there look the same. Or maybe at least similar. But, it turns out that stars are very different and we shouldn't stereotype them. Some are bigger, some...

What is a sport? Do arbitrary and technophobic rules matter?

In this video contemporary chronicle accounts describe the Battle of Hastings in 1066.

Welcome back to the third episode of our new format for Bizarre Beasts, which we're calling Season Zero. Over the next year, we will be remastering episodes of Bizarre Beasts that were originally created for Vlogbrothers.

Florence is the regional capital of Tuscany and is home to many masterpieces of Renaissance art and architecture. Florence was a center of medieval European trade and finance and one of the wealthiest cities of that era. It is considered...