Radiocarbon dating dates back to
The discovery changes the understanding of when humans reached North America.
The study, to be published this week in the science journal Nature, said the numerous limb bones fragments of a young male mastodon found at the site show spiral fractures, indicating they were broken while fresh.
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.
The time of the first peopling of Mesoamerica remains a puzzle, as it does for that of the Americas in general.The scientists say they found what appear to be hammerstones and stone anvils at the site, showing that ancient humans had the manual skill and knowledge to use stone tools to extract the animal's Bone Marrow and possibly to use its bones to make tools.The site was named Cerutti Mastodon site, in honor of Richard Cerutti, who made the discovery and led the excavation.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.