13min - The Greater Yellowstone Area was once a rich grazing ground for huge Columbian mammoths; now, it's a prime hunting ground for paleontologists and archaeologists to study the remains of these beasts.
20min - Montana's Hell Creek Formation is home to a trove of late Cretaceous fossils, revealing the last days of the dinosaurs; researchers have found a complete Triceratops skull that may reveal one of the last prehistoric battles before dinosaurs vanished.
15min - Craters of the Moon National Monument is desolate, but 2,200 years ago, it was the site of today's Yellowstone Hotspot, known for violent eruptions and huge craters.
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