Such spikes, wielded with such force, could have easily killed, or injured a shark, dolphin ... of a difference between the ...

Meet Dunkleosteus, perhaps the fiercest fish that ever existed. It lived 360 million years ago and was twice as long and three times as heavy as a great white shark. Vint Cerf of Google on the ...

Evidence suggests Cretoxyrhina fed on mosasaurs, plesiosaurs, and even the giant bony fish Xiphactinus, a fierce predator itself. Sharks are made of cartilage, which does not fossilize well.

The cartilaginous fish, so-called because cartilage formed their skeletons, later gave rise to sharks and rays. They had small, rough scales, fixed fins, and sharp, replaceable teeth. The second ...

Megalodon may be the most well-known prehistoric shark ... stingrays, large fish and even other sharks.

New research suggests that the prehistoric megalodon, the biggest shark known to have existed, was even larger than we thought. British journalist and translator who joined Diario AS in 2013.

In the Strait of Messina, between Italy and the island of Sicily these prehistoric animals ... of its habitat and over fishing. Importance: The six gill shark is a rarely seen species which ...