13000-year-old Footprints Found in British Columbia - HowStuffWorks

HowStuffWorks
13000-year-old Footprints Found in British Columbia
HowStuffWorks
One of the footprints in the waterlogged clay is seen here stained blue by photo enhancement to show the outline more clearly. Joanne McSporran. We know humans have been in North America for thousands of years, and there's been a debate about how they ...and more »