Whales are a group of mammals that live in oceans. They include some of the largest animals on Earth. The blue whale is the ...

A new study proposes that the massive ancient shark was built more slenderly than a great white. But not all paleontologists ...

At first glance, the world’s second largest fish might seem menacing: Its gaping mouth has six rows of teeth in its upper jaw, and nine rows below, for a total of about 1,500 tiny, hooked teeth.