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Human footprints found in New Mexico are about 23,000 years old, a study reported, suggesting that people may have arrived long before the Ice Age’s glaciers melted. Ancient human footprints preserved in the ground across the White Sands National Park in New Mexico are astonishingly old, scientists reported on Thursday, dating back about 23,000 years to the Ice Age.The results, if they hold up to scrutiny, would rejuvenate the scientific debate about how humans first spread across the Americas, implying that they did so at a time when massive glaciers covered much of their path.Researchers who have argued for such...

Researchers excavated human footprints out of a small bluff next to a dried-up playa lake and radiocarbon-dated embedded seeds to around 23,000 years ago. Their results suggest that people entered the Americas thousands of years earlier than the accepted estimate....some of these prints could be tens of thousands of years old, making them potentially the best evidence yet that people reached the Americas far earlier than once believed. Radiocarbon dating of seeds surrounding the prints suggests that they were made during the Last Glacial Maximum, when massive ice sheets are thought to have blocked any passage from the Bering Land...

The footprints at White Sands were dated by examining the seeds of an aquatic plant that once thrived along the shores of the dried-up lake, Ruppia cirrhosa, commonly known as ditchgrass. According to research published Thursday in the journal Science and co-authored by Bustos, the ancient ditchgrass seeds were found in layers of hard earth both above and below the many human footprints at the site, and they were radiocarbon-dated to determine their age. The tracks at one location have been revealed as both the earliest known footprints and the oldest firm evidence of humans anywhere in the Americas, showing...

In January 2020, Jeff Pigati and Kathleen Springer, both research geologists at the U.S. Geological Survey, went to New Mexico’s Tularosa Basin at White Sands National Park to see about some footprints. These weren’t just any footprints; the fossilized tracks represent the oldest human footprints in North America. What’s more, Tularosa Basin, about 20,000 years ago, was in the midst of what’s known as the Last Glacial Maximum (LGM). During this chilly, final part of the Pleistocene Era, the global sea level was about 400 feet lower and glaciers covered 25 percent of Earth’s land. Their mission was to find...