The Tate Museum has many different
prehistoric species on display, including
Dee the Mammoth.

All of the exhibits have been found all over Wyoming. Dee the Mammoth was found near Glenrock, WY. There also was a Trex recently found in eastern Wyoming. This find is very exciting since the whole skelatin, except a few bones, were found all together in order. The people digging this site actually cut out the whole slab of rock and brought it back to Casper College. The chunk of rock is so big that it has to be stored in a different building than the museum. The Trex will eventually will be brought in the museums to the Tate Prep Lab to be cleaned up. This Trex may not be ready for display for another 3 years.
The Tate Prep Lab is where they clean and work on fossils found. There is a huge window that you can look through and watch them work. It is a very cool learning experience.
Neat fact:
The most common dinosaur found in Wyoming is the Triceratops and the duckbill. There are very few full bodies of the triceratops. Usually only the head of the dinosaur is found. The team up at the museum is currently working on the frail and horn of a triceratops.