Footprint Discovery Hints at Humans in the Americas More Than 20,000 Years Ago

[Bok]

Seeds found in fossilized tracks fuel new speculation about when—and how—people arrived

-- Read more on ScientificAmerican.comhttp://feeds.feedburner.com/~ff/ScientificAmerican-News?i=hf4nQuvcJd4:kc7VsXMhCl4:V_sGLiPBpWU (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/ScientificAmerican-News?i=hf4nQuvcJd4:kc7VsXMhCl4:gIN9vFwOqvQ (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:gIN9vFwOqvQ) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=cGdyc7Q-1BI (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:cGdyc7Q-1BI) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=QXVau8BzmBE (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:QXVau8BzmBE) http://feeds.feedburner.com/~ff/ScientificAmerican-News?i=hf4nQuvcJd4:kc7VsXMhCl4:F7zBnMyn0Lo (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:F7zBnMyn0Lo) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=l6gmwiTKsz0 (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:l6gmwiTKsz0) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=I9og5sOYxJI (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:I9og5sOYxJI) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=qj6IDK7rITs (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:qj6IDK7rITs) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=yIl2AUoC8zA (http://rss.sciam.com/~ff/ScientificAmerican-News?a=hf4nQuvcJd4:kc7VsXMhCl4:yIl2AUoC8zA)
http://feeds.feedburner.com/~r/ScientificAmerican-News/~4/hf4nQuvcJd4

More... (http://rss.sciam.com/~r/ScientificAmerican-News/~3/hf4nQuvcJd4/)