And then when the saltwater disappeared, it was freshwater again. You’d have Megafauna such as mammoths, bison, mastodons, giant armadillos the size of a car,” said Chasteen. Guests can expect ...

If the prehistoric mastodon fossil hadn't been found when it was, it might have dried out and crumbled. A teenager went looking for arrowheads on a friend’s farm in Iowa. Instead, he found the bones ...