Scientists unearth when the first humans came to Alberta’s oilsands
Infrared light causes those particles to release energy. That can then be measured to reveal when the host sand grains were buried, along with the stone tools buried beside them.In this case, the answer was 12,000 years, give or take a millennium.The findings put those early people right at the start of when that part of the world became livable.
The date isn’t too long after humans first came to North America, which most archeologists believe happened about 16,000 years ago. They would have found a landscape very far from the lush boreal forests and teeming wetlands that now cover much of northern“People are dealing with a much different environment than what we see today — open, dry, cold,” Woywitka said. “Probably tundra-y or grassland.”“Whether they came from the north or south, we don’t know.”Despite the proliferation of artifacts, scientists can’t fit them neatly into the cultural tool kits of other prehistoric people.
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