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The Conversation USA

Sharks that hunted near Antarctica millions of years ago recorded Earth's climate history in their teeth

  • Written by Sora Kim, Assistant Professor of Paleoecology, University of California, Merced
imageSharks' teeth carry clues about the oceans they swam in.Christina Spence Morgan

Tens of million years ago, sand tiger sharks hunted in the waters off the Antarctic Peninsula, gliding over a thriving marine ecosystem on the seafloor below.

All that remains of them today is their sharp pointed teeth, but those teeth tell a story.

They’re helping...

Read more: Sharks that hunted near Antarctica millions of years ago recorded Earth's climate history in their...

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