Paleo-human footprints dotting White Sands National Park in New Mexico are 23,000 to 21,000 years old, making them the oldest known fossilized trackways left by people in North America, a new study finds. However, not everyone agrees with the results.
The study, which used two dating techniques to verify the trackway's age, is a response to criticism that an earlier study published in 2021 by the same group used unreliable material to date the footprints. Now, all three results — the earlier, controversial one and the two new findings from different dating techniques — point to the trackways being 23,000 to 21,000 years old. That means they date to around the time of the Last Glacial Maximum (26,500 to 19,000 years ago), the coldest part of the last ice age.
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