The discovery changes the understanding of when humans reached North America.
Buitreraptor is related to Velociraptor, the presumed cunning killer made famous by Hollywood.Both belong to a class of birdlike dinosaurs that ran swiftly on two legs and are called dromaeosaurs.Since dromaeosaurs had only been found in places that used to be part of Laurasia, scientists figured that the beasts evolved into being after Pangea split.But the Buitreraptor fossil in South America, which dates back 90 million years and closely resembles fossils from the North, means one of two things: Either dromaeosaurs existed when Pangea was intact; or the newfound Buitreraptor and its northern look-alikes evolved separately yet with remarkably similar results.The 11 scientists involved in the study told CNN it's too early to tell the impact of the new findings.
For now they want the general audience to see it and understand it, and for their peers to study it -- and even challenge it. is long before the ancient African is known to have occupied EAST ASIA.
But it wasn't until now that scientists were able to accurately date the findings, and possibly rewrite the history of the New World as we know it.
"This is a whole new ball game," Steve Holen, co-director of the Center for American Paleolithic Research and the paper's lead author, told CNN.
The new find suggests such raptors go back much further in time than previously thought.
Until recently, dromaeosaurs had been found only in Asia and North America and only in the Cretaceous period, which ran from 145 million to 65 million years ago.
As with dromaeosaurs, new discoveries are forcing scientist to re-consider their earlier theories of Human presence in the American hemisphere as well.