It sits a daunting meters above a valley, overlooking a desert landscape in the mountains north of Zacatecas.
Getting there requires a 4- or 5-hour uphill scramble over a moonscape of jagged boulders. By combining state-of-the-art dating methods, the team argues that humans were at the site at least 26, years ago—more than 10, years before any other known human occupation in the region.
The dates place humans there during the height of the last ice age, when ice covered much of what is now Canada and sea levels were much lower. To have settled fun date ideas Elkhart IN area Mexico by then, Ardelean says, people must have entered the Americas 32, years ago or more, before the ice reached its maximum extent. For decades, most researchers thought humans arrived in the Americas approximately 13, years ago; occasional claims of an earlier arrival met strong criticism.
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But over the past decade, evidence for earlier migrations has emerged at sites from Canada to southern Chile. Stone tools like this one, from deep in Chiquihuite Cave in Mexico, suggest people lived there at least 26, years ago.
Researchers attribute thousands of broken animal bones there —dated to about 24, years ago—to human hunting. But the site remains controversial, in part because few stone tools or cut marks have been found among the bones.
Were humans living in a mexican cave during the last ice age?
Ardelean heard about the cave from local villagers. Beginning inhe and his team spent 1 month or more at a time at Chiquihuite, resupplying every few weeks using donkeys. Although forbidding Cedar Rapids women seeking man, the site would have looked far more hospitable 26, years ago. DNA and other evidence the researchers extracted from inside the cave show it opened onto a lush landscape harboring cranes, condors, marmot, goat, sheep, horses, and bears.
Digging into the cave floor over the past 8 years, Ardelean and his team found stones shaped into what look like scrapers, hand axes, spear points, and other tools at depths of up to 3 meters. Dating experts at the University of Oxford, the University of New South Wales UNSWand elsewhere determined when the rocks had last been exposed to light and radiocarbon-dated more than 50 samples of animal bone and charcoal found near the dating in Oceanside CA expat.
As the group reports today in Naturethe artifacts were deposited starting 26, years agoand accumulated on the cave floor for the next 16, years. The authors argue that it adds up to a continuous human presence, with people regularly visiting the cave over millennia.
But the team found no human DNA or bones cutmarked by human hands. Humans adapt and adopt new technology.
Becerra-Valdivia says work in other sites, especially those south of the United States, may turn up corroborating evidence. By Meredith Wadman Aug. By Robert F. Service Aug. By Mennatalla Ibrahim Aug. All Alaska pick up girls Reserved.
Researchers dug nearly 3 meters deep in Chiquihuite Cave and found almost stone tools. Got a tip? How to contact the news team.
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