Early Americans

Archaeologists in Mexico claim they have found 40,000 year old foot prints that have been preserved in volcanic ash. Most scientists support the theory that the peopling of the Americas occurred by crossing a land bridge in Alaska about 10,000 years ago. If true, this find will make the field rethink the history of the Americas, and reconsider other sites that claim to be older than 10,000 years old. The question will remain, however, who were those first Americans, and where did they come from?