Alphadon (meaning "first tooth") was a genus of small, primitive mammal that was a member of the metatherians, a group of mammals that includes modern-day marsupials. Its fossils were first discovered and named by George Gaylord Simpson in 1929.[2]
Set during the days of the Pleistocene Ice Age of North America Megafauna the film centers around three main Manny the Woolly Mammoth Sid the Nothrotheriops and Diego the Smilodon Fatalis
