To an archaeologist examples of relative dating methods include

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"Buitreraptor is one of those special fossils that tells a bigger story about the Earth's history and the timing of evolutionary events," said Peter Makovicky, curator of dinosaurs at The Field Museum.

The time of the first peopling of Mesoamerica remains a puzzle, as it does for that of the Americas in general.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.C, hunting peoples had occupied most of North America, south of the glacial ice cap covering the northern part of North America.These men hunted such large grazing mammals as mammoth, mastodon, horse, and camel.

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