How Radar Detected Prehistoric Footprints Beneath White Sands National Monument
Cool story from Atlas Obscura.
At the end of the last Ice Age, it looked a lot different. Neighboring Lake Otero was beginning to evaporate, leaving behind selenite crystals that eroded into the sands of Alkali Flat. In the waning days of the Pleistocene, a human, a ground sloth, and a mammoth trudged across the eastern side of that disappearing lake. Now, well over 10,000 years later, researchers from Cornell University, Bournemouth University, and the National Park Service are using ground-penetrating radar to study the tracks they left behind.
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