Noted: Led by Samuel Munoz, now a graduate student at the University of Wisconsin Madison, researchers found that climate and human changes seemed to happen in step. Paleo-Indians, hunter-gatherers known for elegant fluted arrowheads chipped from stone, lived in the region from about 13,500 to 11,250 years ago, when the area had a tundra-like landscape with spruce and sedges. They may have hunted caribou.
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