In this SciShow Kids compilation, Jessi and Squeaks learn about why teeth are important, how they're different, and why some animals have really weird ones.

As revolutionary as teeth were, they would go on to disappear in some groups of vertebrates. But why?

20 million years ago, the ocean housed a creature so colossal that its stomach could reach volumes of almost 10,000 liters— big enough to fit an entire orca. It was the megalodon, the biggest shark to ever live. So, what was it like when...

Teeth are so well preserved in the fossil record that they make the best, most informative fossils we can find, from phylogenetic studies to learning about the evolution of the human brain.

Everywhere in the animal kingdom you can find teeth in all sorts of shapes and sizes, so you probably think you have a pretty good idea where they came from. But in reality, this debate is still a hot one, and it may have something to do...

Teeth. We've all got 'em (most of us, anyway). But how do they grow? Teeth are made from some biological nanotechnology that will blow your mind. They are strong enough to last hundreds of millions of years. Oh, and if you've ever...

There’s nothing fun about getting a cavity! It can feel like there’s not much you can do to prevent them, but researchers are working on several ways to tackle their main cause so we can create a cavity-free world!

Do popsicles give you toothaches? Do you wonder why that special toothpaste makes it all better? We've got you covered!

Join Jessi and Squeaks in their brand new fort as they answer letters from their friends in Ivydale, England!

Your teeth contain traces of strontium isotopes that can reveal where you lived while they were forming.

By giving some fossils a dental exam, we've learned more about how tusks first evolved. And humans aren't the only primate that can get down at karaoke night.

The deep-sea dragonfish is a predator that lives deep in the Pacific Ocean. Like many other deep sea predators, it's got an oversized jaw and a bioluminescent appendage to attract prey, but it does have one weird (and strangely useful)...

Picture this: you're gorging on leftover Halloween candy. You take a bite of a fun-size chocolate bar and instead of sugary goodness, you get a flash of blinding pain in your tooth! What's the deal?

We love carbonated drinks, but they also get a bad rap. What does bubbly water do to our body? Is it really bad for us?

When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can we avoid them? Mel...

That intense shooting cold pain in the teeth when you bite into a cold ice cream cone just hits differently than, say, making a snowball with your bare hands. But what makes cold teeth feel so much more painful than cold skin?

Your teeth carry secrets: centuries of history about your ancestors, from where they lived to what they ate and where they traveled. Bioarchaeologist Carolyn Freiwald traces the story of human migration across the Americas -- from Mayan...

We all need to do it! Learn why we all should brush our teeth, and how brushing keeps our teeth strong and healthy!

If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy? Quick Questions explains why, and how we finally figured it out.

Howcast - Learn how to custom paint your skateboard from SHUT Skateboards' Michael A. Cohen in this custom skateboard Howcast video, part two of three.

Howcast - Learn how to paint radiators and metal from Brushed Interiors founder David Sartori in this Howcast video.

Howcast - A little vulnerability never hurt anyone, but there's one part of you that can be too sensitive—your teeth. Here's how to toughen up your chompers.

This video discusses new research that suggests sports drinks can lead to alarming levels of tooth erosion, eating away dental enamel at a rate 30 times greater than plain water. Scientists from the University of Birmingham have...

In this video, we learn about the importance of taking care of our teeth and visiting the dentist. We discover that humans have two sets of teeth - baby teeth and permanent adult teeth - and that enamel, the outer layer of our teeth, is...