Alleged 40,000-year-old human footprints in Mexico much, much older than thought

Alleged footprints of early Americans found in volcanic rock in Mexico are either extremely old - more than 1 million years older than other evidence of human presence in the Western Hemisphere - or not footprints at all, according to a new analysis published this week in Nature.

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<p><a href="http://www.physorg.com/news8657.html">Alleged 40,000-year-old human footprints in Mexico much, much older than thought</a></p> <p>Alleged footprints of early Americans found in volcanic rock in Mexico are either extremely old - more than 1 million years older than other evidence of human presence in the Western Hemisphere - or not footprints at all, according to a new analysis published this week in <i>Nature</i>.</p>