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

So what exactly is it that makes a hangover suck so hard? Turns out there are three things interacting to make you feel miserable. Hank's got the details in this episode of SciShow.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Pleo the robot dinosaur acts like a living pet -- exploring, cuddling, playing, reacting and learning. Inventor and...

In part 2 of our special series on human ancestry, we ask why we are the only surviving branch on the human evolutionary tree. Just 50,000-100,000 years ago, Earth was home to three or four separate human species, including our most...

From the very large to the very small, the universe is an amazing place. Here's my favorite ways to explore its scale.

Chip Kidd doesn't judge books by their cover, he creates covers that embody the book -- and he does it with a wicked sense of humor. In this deeply felt (and deeply hilarious) talk, he shares the art and the philosophy behind his cover...

They're probably the most successful birds in the history of birds. But what do you really know about pigeons? Hank shares three weird facts about the birds, from their amazing chick-raising trick to their history of heroism in wartime.

There’s no question that comets have been regarded as some of the most beautiful things in the night sky for thousands of years. But why are their heads often green but never their tails?

Singer Rhiannon Giddens joins international music collective Silk Road ensemble to perform "St. James Infirmary Blues," spiking the American folk song that Louis Armstrong popularized in the 1920s with Romani influence and mischievous...

The term "gaslighting" has gained popularity in recent years, but what exactly does it entail?

Tyrannosaurus rex was big, Tyrannosaurus rex was vicious, and Tyrannosaurus rex had tiny arms. The story of how T-Rex lost its arms is, itself, pretty simple. But the story of why it kept those little limbs, and how it used them? Well,...

Daniel Tammet has linguistic, numerical and visual synesthesia -- meaning that his perception of words, numbers and colors are woven together into a new way of perceiving and understanding the world. The author of "Born on a Blue Day,"...

In a small town, a proud mother showed off her newborn son. Upon noticing his lucky birthmark, townsfolk predicted he would marry a princess. But soon, these rumors reached the wicked king. Enraged, the king stole the child away, and...

It was Christmas in Camelot and King Arthur was throwing a party. In the midst of the revelry, a towering knight proposed a game. He challenged the warriors present to attack him with his own axe. If they could strike him down, they...

In his typically candid style, Richard St. John reminds us that success is not a one-way street, but a constant journey. He uses the story of his business' rise and fall to illustrate a valuable lesson -- when we stop trying, we fail.

Sometimes, big hunks of strange-looking flesh wash up onshore and then people think that they're dinosaurs or giant octopi or previously undiscovered species. Turns out the ocean can do nasty things to dead things...making them just...

Be the hit of your party and learn how to pour the perfect beer-- (with the additional party trick of knowing the chemistry behind why, of course!)

In ancient Greece, the best-known remedy for a long-standing headache was to drill a small hole in the skull to drain supposedly infected blood. Fortunately, doctors today don't resort to power tools to cure headaches, but we still have...

Meet the Mad Haterpillar with Henry Reich from Minute Physics

Take it from an expert: It’s weird to hear how your voice really sounds. But why does it sound different to you than everyone else. Hank explains -- in a deep, resonant voice.

General Motors veep Larry Burns previews cool next-gen car design: sleek, customizable (and computer-enhanced) vehicles that run clean on hydrogen -- and pump energy back into the electrical grid when they're idle.

Snakes aren’t just muscle-y danger noodles. They're extremely diverse, and some have really weird, unique adaptations that we could all probably appreciate a little more.

High-pitched falsetto singing can show off a singer’s physical ability, because singing this way takes a lot of effort and some careful physics!

As the coronavirus pandemic raged in her native Sri Lanka, monk JayaShri Maathaa had a thought: two magical words that planted something beautiful in her mind and blossomed into a whole new way of being. She shares how this mantra...