Millions of years ago, this Arizona desert was covered by the sea... something that's slightly difficult for me to fathom. Just ask my husband --I bring this up almost every time we're driving through that dry, desolate stretch of land between Phoenix and Tucson. So after months of bugging, I finally managed to get husband to accompany me to the Arizona Museum of Natural History, where I could go on some more about how Arizona was once undersea.

Aerosaurus

Estemmenosuchus

Flash flood time! These waterfalls inside the museum have timed flash floods.

Garfish --this is considered a living fossil (almost unchanged for the last 50 million years).