"Last summer, I purchased a couple of bags of Vigoro red lava rock from my local ... but there it was in my hand—no joke." The great white shark tooth that Steven Phillipe found in a bag of ...

While a great white shark's 300 serrated teeth are an amazing hunting adaptation, what's even more amazing is their replaceability. In a lifetime, each shark can grow up to 20,000 of them.

Megalodon’s teeth resemble those of a modern great white shark, so some scientists previously concluded that the two sharks had a similar stout body shape. Shimada followed this hypothesis when ...

Sharks don’t chew, so this combination of pointed lower teeth and serrated upper teeth helps them to cut prey into smaller pieces for swallowing. Great white sharks have this combination of teeth.

The tip of a megalodon tooth is preserved in this fossil whale rib bone Most reconstructions show megalodon looking like an enormous great white shark, Carcharodon carcharias. This is now believed to ...

The replicas seen at many museums are all based on size estimates from teeth or other partial fossils. Photograph by Alexander Demianchuk, Reuters/Redux Like great white sharks, the megalodon had ...