December 22, 2024

Fearsome Sharks of Today Evolved When Ancient Oceans Got Hot

 Fearsome Sharks of Today Evolved When Ancient Oceans Got Hot

Fearsome Sharks of Today Evolved When Ancient Oceans Got Hot

More than 100 million years ago, scientists say, warming seas and reduced oxygen may have sent some sharks higher into the water column, where they evolved to be fierce and hungry.

Jeanne Timmons