It has a long head and long tail and wing-like forelimbs.
Advanced radiometric dating technology allowed scientists to determine the mastodon bones belong to the Late Pleistocene period, or 130,000 years old, with a margin of error of plus or minus 9,400 years."The bones and several teeth show clear signs of having been deliberately broken by humans with manual dexterity and experiential knowledge," Holen said in a press release.
Experts agreed that the earliest records of human ancestors in North America is about 15,000 years old, but the discovery of the Cerutti site "shows that human ancestors were in the New World ten times that length of time," said paleontologist Lawrence Vescera.
Odds being against such striking parallel evolution, paleontologists speculate that dromaeosaurs more likely originated more than 180 million years ago, before Pangaea broke apart.
The newly discovered fossil also shows that the creatures developed slightly different characteristics after they split up.
It has been widely accepted that groups of peoples entered the American hemisphere from northeastern Siberia, perhaps by a land bridge across the Bering straits of Alaska that might have existed then, (This at some time in the Late Pleistocene, or Ice Age).