As we drove to Morrill we saw The Mammoth Site and it's the biggest mammoth site in the world.
There is mammoth bones there and they are very fragile because they haven't turned in to fossils yet.
They have found 61 male mammoth skeletons so far in their excavation. They can still dig another 40 feet down to find more.
It was found when a man started digging to build a house and a bulldozer hit a tusk.
There are two types of mammoth skeletons here - Wooly Mammoth and Columbian Mammoths. Wooly mammoths are smaller and the rarest that they've found.
There were also skeletons of other animals that they've found too.