
Sharks that are warm-blooded such as the Great White and extinct Megalodon could be much more common than thought.
But the discovery rings alarm bells for marine biologists as a changing climate could make it harder for warm-blooded fish to live.

Sharks that are warm-blooded such as the Great White and extinct Megalodon could be much more common than thought.
But the discovery rings alarm bells for marine biologists as a changing climate could make it harder for warm-blooded fish to live.