News > Ancient shark teeth lost in Antarctica millions of years ago recorded Earth’s climate history

Ancient shark teeth lost in Antarctica millions of years ago recorded Earth’s climate history

13/07/2021 05:15 PM | Click to read full article

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 solve the mystery of why the Earth, some 50 million years ago, began shifting from a “greenhouse” climate that was warmer than today toward cooler “icehouse” conditions.

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