In the United States, it's estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn't just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what...

Sleep is complicated. And there's still a lot we don't know about it, but zebrafish larvae are a surprisingly good place to look to learn more about what makes us sleepy.

It is important to get enough sleep, but what happens when you get those eight hours in little naps instead of in one big chunk at night?

Scientists have had some success with a new technique to restore awareness to a person in a vegetative state & also that we could potentially use the water cycle to power most of the United States!

It turns out there are number of aspects of driving that can potentially conspire to lull our bodies into a potentially dangerous state of drowsiness.

BAHHHHHH! Did I scare you? What exactly happens when we get scared? How does our brain make our body react? Just what are Neurotransmitters? In this episode of Crash Course Psychology, Hank takes us to the simplest part of the complex...

A while back, we were tasked with answering some of the world's most asked questions. So here, in one convenient location, are some of those questions and their answers.

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.