Bats sleep upside down, so how come they don't fall? Turns out that they've got some unusual legs.

As a young girl, photojournalist and TED Fellow Kitra Cahana dreamed about running away from home to live freely on the road. Now as an adult and self-proclaimed vagabond, she follows modern nomads into their homes -- boxcars, bus stops,...

For creatures that look nothing like us, fruit flies have been able to teach us a lot about human biology as we’ve studied them over the past century.

In the 3rd millennium BCE, Mesopotamian kings recorded and interpreted their dreams on wax tablets. In the years since, we haven't paused in our quest to understand why we dream. And while we still don't have any definitive answers, we...

Study after study has shown that napping is awesome. This might make you wonder: should everyone be napping? The answer is more complicated than you might think.

Have you ever found yourself seeing images right before falling asleep? You might be experiencing hypnagogia.

In 1849, in the ancient city of Nineveh in Iraq, archaeologists sifted through dusty remains, hoping to find records to prove that Bible stories were true. What they found instead was a 4,000-year-old story inscribed on crumbling clay...

Alzheimer's doesn't have to be your brain's destiny, says neuroscientist and author of "Still Alice," Lisa Genova. She shares the latest science investigating the disease -- and some promising research on what each of us can do to build...

It's 4am, and the big test is in 8 hours. You've been studying for days, but you still don't feel ready. Should you drink another cup of coffee and spend the next few hours cramming? Or should you go to sleep? Shai Marcu defends the...

A curious, quiet revolution of sound has taken over the internet. Physiologist Craig Richard explains the soothing brain science of Autonomous Sensory Meridian Response (ASMR), tracking its rise in popularity and why this fascinating...

In this short talk, Arianna Huffington shares a small idea that can awaken much bigger ones: the power of a good night's sleep. Instead of bragging about our sleep deficits, she urges us to shut our eyes and see the big picture: We can...

Hank is joined this week by Stevie Boebi, lesbian sex expert and host of her own YouTube channel, as well as Jessi and Huckleberry from Animal Wonders!

Teens don't get enough sleep, and it's not because of Snapchat, social lives or hormones -- it's because of public policy, says Wendy Troxel. Drawing from her experience as a sleep researcher, clinician and mother of a teenager, Troxel...

Imagine you're fast asleep and then suddenly awake. You want to move but can't, as if someone is sitting on your chest. And you can't even scream! This is sleep paralysis, a creepy but common phenomenon caused by an overlap in REM sleep...

Long months or years spent in space can be isolating, making astronauts susceptible to boredom and depression. Here's a look at some long-term studies we've done here on Earth to figure out what isolation does to people, and how to make...

Halloween is right around the corner and Burger King is celebrating this spooky time with the “nightmare-inducing” burger. But will it really give you nightmares?

Dreaming is very weird, but you might be able to learn something from your dreams.

In a moving and madly viral video last year, composer Eric Whitacre led a virtual choir of singers from around the world. He talks through the creative challenges of making music powered by YouTube, and unveils the first 2 minutes of his...

Becky Blanton planned to live in her van for a year and see the country, but when depression set in and her freelance job ended, her camping trip turned into homelessness. In this intimate talk, she describes her experience of becoming...

Animal fan Nellie McKay sings a sparkling tribute to her dear dog. She suggests we all do the same: "Just go right to the pound/ And find yourself a hound/ And make that doggie proud/ 'cause that's what it's all about."

Space is hard on the human body, but a certain ground squirrel might have the guts to show us how to last longer in space.

Why you REALLY can't sleep #shorts #science #SciShow

Last week, the Cassini probe dove into Saturn, never to be heard from again, but thankfully, Cassini wasn't the only probe out there. And we've also found an exoplanet that might be even darker and stranger than we thought.

With their powers combined, coffee and naps create a greater sum than their parts.