Hunting For Traces Of America's First Inhabitants
Reporting in Science, researchers write of finding blades and spear points that pre-date Clovis tools ? long thought to be the earliest evidence of people in the Americas. Archaeologist Michael B. Collins talks about how the discovery could change theories about the first inhabitants.
Source: http://www.npr.org/2011/03/25/134855884/Hunting-For-Traces-Of-Americas-First-Inhabitants?ft=1&f=1007