The world-famous Field Museum has a room dedicated to the specimens found at Wyoming's Fossil Lake. Go back in time to see how things haven't changed that much.
The majority of avian species perch, and in it is a fairly new trait in their evolution. Found at Wyoming's Fossil Butte, this is the oldest bird of its kind.
Did you know there are two "Hell's Half Acres?" There is the one just outside of Casper where they filmed parts of Starship Troopers, and then there is one in Idaho.