Hidden within the seemingly barren expanse of White Sands National Park in New Mexico are human footprints. But these impressions are much more than random tracks: They are ancient vignettes cast in gypsum-rich sand. The footprints tell stories of hunters stalking a giant sloth; a traveler slipping in mud with a child on one hip; children jumping in puddles, splashing in play; and more. But one question has plagued researchers studying these prints. Exactly how long ago were they made? A paper p
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Following up a on study in 2021 of tracks found in New Mexico, researchers used more methods to bolster the claim that the tracks are up to 23,000 years old.