286. A Prehistoric Journey in Denver 

In which X7 takes us on a journey into Denver's past, from the Devonian to the K-T Boundary. There are mammals at the museum, but those are not dinosaurs now, are they? 7 has been to this museum many times growing up, and a lot of these fossils are like old friends. Many are new friends as well! It is nearly a journey to the beginning of time!