Shark teeth could lose their cutting edge as oceans become more acidic, new research warns. Scientists in Germany say rising carbon dioxide levels may erode the very weapons that predators rely on for ...

Add Yahoo as a preferred source to see more of our stories on Google. The only thing scarier than an ocean filled with sharks, is an ocean with no sharks at all. That might be the future we’re heading ...

Shark teeth found in 5-million-year-old whale skulls provide direct evidence of ancient feeding behavior and predator-prey ...

PORTLAND, Maine — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put those ...

Photographs (left) showing the extinct right whale partial skull with shark bite marks highlighted in red. The more complete ...