Research suggests our ancestors traveled the oceans 70,000 years ago.
http://www.wvwnews.net/story.php?id=2319
by Heather Pringle
Jon Erlandson [photo at right shakes out what appears to be a miniature evergreen from a clear ziplock bag and holds it out for me to examine. As one of the world’s leading authorities on ancient seafaring, he has devoted much of his career to hunting down hard evidence of ancient human migrations, searching for something most archaeologists long thought a figment: Ice Age mariners. On this drizzly late-fall afternoon in a lab at the University of Oregon in Eugene, the 53-year-old Erlandson looks as pleased as the father of a newborn—and perhaps just as anxious —as he shows me one of his latest prize finds.
The little “tree” in my hand is a dart head fashioned from creamy-brown chert and bristling with tiny barbs designed to lodge in the flesh of marine prey. Erlandson recently collected dozens of these little stemmed points from San Miguel Island, a scrap of land 27 miles off the coast of California. Radiocarbon dating of marine shells and burned twigs at the site shows that humans first landed on San Miguel http://www.wvwnews.net/story.php?id=4462 about it,” he says. “But we are getting very close.”
http://discovermagazine.com/2008/jun/20-did-humans-colonize-the-world-by-boat