Human footprints in U.S. date back 21,000 to 23,000 years: study

It was previously believed humans existed in North America somewhere between 13,500 and 16,000 years ago, but these footprints are much older.

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United States ,America ,Jeff Pigati ,White Sands ,Kathleen Springer ,National Park Service ,North America ,Last Glacial Maximum ,National Park ,Fossilized Footprints ,Radiocarbon Dating ,White Sands National Park ,Us Geological Survey ,Footprints ,