Carcharocles megalodon could reach up to 60 feet in length and had jaws measuring 9 feet wide. It lived from 23 million years ago up until the end of the Pliocene Epoch, around 2.6 million years ago.

But not just this giant armadillo. Giant sloths, four-tusked elephants, and a whole bunch of other ancient mammals that roamed the earth over 10,000 years ago also all played a role. Over at National ...

Paleontology and science : what is science? -- Distinguished paleomammalogists -- Geological and ecological history of South America during the Cenozoic era -- North American late Cenozoic faunas -- ...