Notes: "All the evidence indicates that the Americas were populated by people who migrated across the Bering Sea at a time when the ice age lowered ocean levels enough to do it. Well, almost all the evidence. Some of the oldest skeletons found in the new world have features that look somewhat European, a link supported by a few pieces of DNA found in some Native American populations. Now, a 20,000-year-old skeleton from Siberia may help clear up the confusion." Source: Ars Technica (2013).