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.