Wyoming and the regions we explore are some of the most complicated and complex in North America. The northern end of the Wind River mountain range was once the axis of our ancient continent and because of this all of our current rivers flow away from this one point.
Wyoming contains fossil records dating from 550 million years ago to present and the sediment layers here have preserved the most complete history of Eocene life (58 to 38 million years ago) than in any other place in the world.
We all know about the mammals of Yellowstone but an interesting story here in Wyoming is the Pronghorn (Antilocapra Americana), while not actually an antelope it is the only surviving member of its family Antilocapridae. It is often cited as the second fastest animal in the world with speeds approaching 70mph. Pronghorns outnumber people in Wyoming.