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Human footprints in White Sands National Park in New Mexico sparked controversy two years ago when scientists found the prints to be surprisingly old, dating to about 22,000 years ago. Now, two other ways of dating the fossilized tracks“The answer to how old the footprints really are is critical,” says archaeologist Loren Davis of Oregon State University in Corvallis, who wasn’t involved with the new study.
The criticism wasn’t surprising, says geologist Jeff Pigati of the U.S. Geological Survey’s Geosciences and Environmental Change Science Center in Denver. “We knew from the very beginning that we were going to have to independently evaluate the ages with different dating techniques.” The pollen yielded an age range of roughly 23,400 to 22,600 years old, and the quartz gave an age minimum of about 21,500 years old. Both results echo the previous age estimate.
An age estimate for ancient human footprints in New Mexico led to controversy in 2021 when scientists first dated them to about 22,000 years ago.Still, Davis wants the researchers to find quartz ages from more rock layers with footprints. If completed, he says, “we would very likely have a resolution.”
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