Steps back in time.(human footprints discovered in Mexico)(Brief Article)

Publication: Natural History

Publication Date: 01-OCT-05

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COPYRIGHT 2005 Natural History Magazine, Inc.

The announcement that some 160 human footprints have been discovered embedded in an ancient layer of volcanic ash near Puebla, Mexico, has stirred the continuing debate about how, and when, people first arrived in the Americas. In spite of disputed evidence and many challenges to the contrary, the consensus...

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