The code breakers

Summary: "For decades, scientists believed that humans were forced to wait until the end of the last Ice Age before they could enter the Americas. In recent years however, tantalizing evidence of an earlier human migration has begun to emerge. In this documentary, Canadian anthropologist and adventurer Niobe Thompson takes us inside the incredible scientific discoveries that are finally unraveling these mysteries."--CBC Learning website. Thompson visits the site in Brazil where the assumed pre-Clovis remains of Luzia were found, but a tooth that is tested contains no carbon content. He also visits Lake Baikal in Siberia, where Andrzej Weber of the University of Alberta has found many human skeletons of the hunting/gathering lifestyle. Though no Ice Age human remains have been found in Beringia (the Bering Land Bridge), Thompson speculates that the ancestors of the people of the New World must have crossed this land. Also visits Paisley, Oregon, where archaeologist Dennis Jenkins finds pre-Clovis human coprolites. Examines the theory that the earliest humans came to North America by boat, at the height of the Ice Age.