These Ancient Footprints Sat Hidden for 23,000 Years, and They Are Changing What We Thought We Knew About America

At the White Sands National Park in New Mexico, beneath the white gypsum dunes, something extraordinary was discovered by scientists, which quietly changes human history, as human footprints embedded in the sediment layers were determined to be 21,000 to 23,000 years old.

As per the research conducted by the U.S. Geological Survey, which was documented by the Smithsonian Magazine, human footprints have now been determined to be the oldest human traces in North America, offering a rare connection to humans who lived through one of the coldest periods in Earth’s history.

The footprints were embedded in ancient lakebed layers, which experienced changes in environmental factors, allowing them to be preserved for thousands of years, with the footprints becoming exposed again in the area when the surface is wet, enabling scientists to access them for research without any requirement for excavation.


As per the documentation by the Smithsonian Magazine, the footprints offer scientists access to the area for repeated research, making this an extremely valuable discovery for scientists.

How scientists confirmed the age

While the initial discovery triggered debate among scientists, especially considering the time frame, which indicated that humans arrived in America far earlier than previously believed, a 2023 USGS publication confirmed the age of the prints using multiple independent methods, which gave credence to the original discovery.

To confirm the age of the footprints, scientists used radiocarbon dating of ancient seeds and pollen located in the same sediment layers as the footprints and also used optically stimulated luminescence dating to determine when the sediments had last been exposed to sunlight.

According to the USGS publication, the methods used to date the footprints have removed all doubts regarding the age of the prints and confirmed that the prints date back to the Last Glacial Maximum.

Rethinking human migration

For decades, the generally accepted theory is that humans came to North America 13,000 to 16,000 years ago and that this is often related to the Clovis culture, but these footprints indicate that there is more to the timeline of the history of humans in America than is generally believed.

As reported in Scientific American, the indication now is that humans were already in America thousands of years earlier than believed, and this poses more questions than answers about their mode of entry and adaptation to their new environment.

It is believed that the earlier humans could have thrived in extreme environments that were considered inhospitable to life.

Life during the ice age

The footprints date back to the Last Glacial Maximum, which occurred between 26,500 and 19,000 years ago. During this time, much of North America was covered with ice, creating extreme environmental conditions.

According to climate research reports by the United States Geological Survey (USGS), the environmental conditions around White Sands would have been cold deserts with scarce resources. Therefore, survival would have been even more difficult.

However, despite the environmental conditions, the fact that there were footprints shows that not only were there humans in the region, but they were also actively moving around, leaving behind footprints of their activities. It is reported that the early inhabitants of the region were able to cope with the cold conditions. However, much is still not known about their lives.

Evidence of megafauna

One of the most interesting aspects of this discovery is that the footprints of humans are found along with the footprints of animals that are already extinct, such as mammoths and ground sloths. According to the news release from the USGS, this discovery reveals that humans and these animals coexisted in the same environment.

Scientists think that this discovery may help them understand how early humans coexisted with these animals and whether this coexistence had any role to play in the extinction of these animals.

Why is the preservation unique

The reason is that the footprints have been preserved in gypsum-rich mud, which over time hardened and produced the details of the prints that have lasted over thousands of years. As Scientific American states, such preservation is rare in that most ancient footprints are buried and not easily accessible, but in this case, they can appear again on the surface of the ground under the right conditions.

It is also interesting in that it allows researchers to see patterns in the walking speed, direction, and even groups of people.

A discovery that reshapes history

The White Sands footprints are more than just marks in the sand because they signify an important shift in the way that scientists think about the peopling of the Americas. As highlighted in the studies by the Smithsonian Magazine and the USGS, this has inspired researchers to revisit old sites and rethink old assumptions.

The discovery has maintained the public’s and scientists’ interest because it offers a personal connection to people who lived tens of thousands of years ago and reminds us that the history of humankind is complex and old.