A shark's teeth usually says "stay away", but we can learn a lot from them, including what type of parents they were.

Welcome to SciShow Quiz Show, where SciShow Space co-hosts Hank and Reid are back for another round!

Learn about some new sea creatures that recently made their debut to the land world!

Smilodon was a fearsome Ice Age cat, the size of a modern-day tiger, that had a pair of fangs nearly 18 centimeters long. But it was only the last and largest of the great sabertooths: ridiculously long canines had already been a trend...

Dinosaurs were social animals, moving in herds, hunting in packs, but could they dance?

Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship, and to discover how those processes...

With its lizard-like appearance and that distinctive sail on it back, Dimetrodon is practically the mascot of the Palaeozoic Era, a time before flowers, birds, mammals, and even crocodiles. But if you take a close look at this...

Associate Producer Stefan Chin faces off against his boss, Hank Green. Will Stefan manage to keep his job? What does a dinosaur sound like? And where is that space whale?

A fish with eerily human-like teeth was caught in a New Jersey lake. And scientists have learned to speak Bird!

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!

Many species show off their teeth as a threat, so where did humans get our friendly smiles?

For more than 10 million years, Megalodon was at the top of its game as the oceans' apex predator...until 2.6 million years ago, when it went extinct. So, what happened to the largest shark in history?

From birds with no wings to giant fowl that were once mistaken for predators, here are 6 birds that who's strange features may not be what you think of when you think of birds!

This week on the SciShow Talk Show Doug Emlen talks about animal weapons! Jessi from Animal Wonders joins the show to talk about animal defenses and introduce us to the southern three-banded armadillo.

Prehistoric teeth prove that hyenas once roamed the Arctic and the relationship between ancient crocodiles and climate is more complicated than we thought.

This week in the journal Nature Communications, scientists report a way to use fossilized shark teeth to figure out where different shark species, including megalodon, stood in the web of life. And last week in the journal Scientific...

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!

It's the battle of the SciShow Psych Hosts: Brit Garner and Hank Green! Brit came prepared, but can Hank still win the game for his Patron?

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

SciShow welcomes back Diana Six to talk to us about current news on the Mountain Pine Beetle Outbreak. Then, Jessi Knudsen Castañeda stops by and brings a familiar friend whose anatomy may help scientists develop better hypodermic...

You've heard of vampires (pale, undead, sometimes sparkly), but did you know some of these myths have basis in scientific fact?

Jessi and Squeaks learn some amazing turkey facts, from the sounds they make to what their poop looks like!

This week, a new theory as to why the mighty and fearsome Tyrannosaurus rex has such cute little arms. And in more fossil news, recently discovered giant ichthyosaur bones present a different picture of the Triassic.