Stained blue through photo enhancement, one of the human footprints emerges from the waterlogged gray clay. Photo by Joanne McSporran
Archaeologists on Calvert Island in British Columbia have uncovered twelve human footprints that may be the oldest found in North America. The prints are at least 2,000 years old, but a piece of charcoal found in the first footprint yielded a radiocarbon date of 13,200 years before present. It's like taking a step back in time.