It’s easy to look at a sleeping dog’s leg twitching and imagine that it’s having a wonderful rabbit-chasing dream. But can animals with brains that are very different from ours have dreams?

More than half of Americans take a dietary supplement, but the truth is, most people don't need them. There are, however, a handful of supplements that can be helpful in some situations!

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Many animals need sleep. But all of the threats and demands animals face don't just go away when it's time to doze. That's why a range of birds, mammals, and even humans experience some degree of asymmetrical sleep, where parts of the...

If you're old enough to drink, you may have had a few too many cocktails and suddenly everything is spinning. Strange as it might seem, that’s not because the alcohol you drank is messing with your brain! So what causes the spins?

It’s hard to study dreams because it’s not like you can communicate back and forth with someone while they’re asleep...at least you couldn’t, until now!

You might have experienced those bizarre and emotionally intense dreams when you have a fever, but what are those?

Dreaming is one of the weirdest things we do & in this SciShow infusion Hank talks about how science is helping us understand why we dream, what our brains are up to when they're doing it, and why dreaming may be critically important to...

At TED@Cannes, Gary Wolf gives a 5-min intro to an intriguing new pastime: using mobile apps and always-on gadgets to track and analyze your body, mood, diet, spending -- just about everything in daily life you can measure -- in...

Are you someone who likes to hit the snooze button four or five times before waking up? Do you have to be physically pulled out of bed every morning? Do you ever wonder if that's normal and healthy? Well, this episode is for you!

You may not be able to unlock all the secrets of the universe while you snooze, but it's still possible to reinforce what you've already learned.

Learn why you may experience jumping in your sleep, and how you can prevent it!

Ever wonder what that dangling thing in the back of your throat is good for? Hank Green explains in this episode of SciShow Quick Questions.

When the ancestor of cetaceans went back into the water some 50 million years ago, it left a few things behind—including the functioning of certain genes that seem like they’d be hard to live without.

Once homebound by epilepsy, mental health advocate Sitawa Wafula found her strength in writing about it. Now, she advocates for others who are yet to find their voices, cutting through stigma and exclusion to talk about what it's like to...

Today, we bring you two surprising effects of the climate crisis: less sleep and more dying trees.

You've probably heard that some types of light, like the kind that comes from your phone or laptop, can be bad for your sleep if you use them too close to bedtime. But let's be real, nighttime is the best time to binge TV, so are we...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Media big shot Felix Dennis roars his fiery, funny, sometimes racy original poetry, revisiting haunting memories...

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...

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?

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.

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.