Long ago, approximately 2.6 million years ago during the Ice Age, prehistoric animals roamed throughout the U.S., including Louisiana. Prehistoric megafauna like the mastodon, which were large, ...

Humans only discovered Arne Ovamgrotta in 1991, but it was a haven for at least 46 species over 75,000 years ago. By Andrew Paul Published Aug 4, 2025 4:09 PM EDT Get the Popular Science daily ...