Free Republic

The Bering land bridge was exposed at various times over an almost three million year period, when wide scale glaciation lowered sea levels by as much as 150 metres. The land bridge was part of "Beringia," which refers to the stretch of land between present day Siberia and Yukon Territory. It's been home to woolly mammoths, steppe bison and humans. Jeff Bond, a geologist with Yukon Geological Survey in Whitehorse, has produced a map showing what Beringia looked like 18,000 years ago. At that time, much of the earth was glaciated, but Beringia remained predominantly ice-free due to its arid...

But hair sample could have been from a wandering mercenary. An early wave of migration into the New World and the Arctic has been identified by sequencing a genome from a frozen hair excavated in Greenland. Archaeological evidence shows that there were two waves of migration to Greenland starting 4,500 years ago, first with the Saqqaq and then the Dorset groups, collectively known as the Paleo-Eskimos. Later, around 1,000 years ago, came the Thule culture which led to the current native population. The relationship between these three groups has been uncertain. Some theories hold that Paleo-Eskimos derived from the populations...