Sharks and rays have populated the world's oceans for around 450 million years, but more than a third of the species living today are severely threatened by overfishing and the loss of their habitat.

The sperm whale on Cuttyhunk Island was a female measuring 32 feet long and weighing about 11 tons, Hedman said.

This process uncovered the DNA of two animals: orcas, also known as killer whales, and broadnose sevengill sharks. Orca DNA was linked to the largest bite wound, found in the center of the shark, ...

Biologists found significant blunt-force trauma on the right side of the head of a 3-year-old whale and suspect it was hit by ...