Other
Geo Times: The Ice Free Corridor Revisited
A very comprehensive article about the ice-free corridor which was possibly the passageway for Paleoindians to enter North America. The discussion includes geology as well as anthropolpgy.
Other
Geo Times: Quest for the Lost Land
A discussion of a migration theory of Paleoindians that went down the west coast of North America. Read about food sources, the geology, and the research behind the theory.