From this data they extrapolated that the prehistoric shark, sometimes called a megatooth shark, could have grown to a maximum size of 80 feet (24 meters) in length. Their study, published today ...

But its size offered plenty of protection, as these prehistoric animals outweighed ... The saber-toothed cats likely preyed on bison, sloths, mammoths, horses, pigs, and llamas.

Deep inside a labyrinth cave in southwestern France, ancient humans who lived around 30,000 years ago carved horses, mammoths and rhinoceroses into the walls, a fabulous prehistoric menagerie that ...