Topic: Helicoprion

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Where Do Teeth Come From?

How long teeth can last? 30,000 years? 200,000 years? 300 million years? In this episode of It's Okay to Be Smart, Joe Hanson gets an up-close look at some ancient saber-toothed tiger (smilodon), mastodon, tyrannosaur...

Fossil Sharks – The Brain Scoop

The Megalodon Shark and Helicoprion: two mysterious, extinct sharks that have left fossilized clues of their existence in the form of their teeth (and some vertebrae). Get a close look at the largest shark tooth and a...

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