The evidence challenges the once-conventional wisdom that humans didn’t reach the Americas until a few thousand years before rising sea levels covered the Bering land bridge between Russia and Alaska.
By Christina Larson, Associated PressThis Oct. 2023 photo made available by the National Park Service shows Human footprints infilled with white gypsum sand. at the White Sands National Park in New Mexico. Fossil human footprints discovered in White Sands, New Mexico likely date back to between 21,000 and 23,000 years ago, according to two lines of scientific evidence published Thursday, Oct. 5, 2023.
The estimated age of the footprints was first reported in Science in 2021, but some researchers raised concerns about the dates. Questions focused on whether seeds of aquatic plants used for the original dating may have absorbed ancient carbon from the lake — which could, in theory, throw off radiocarbon dating by thousands of years.
“This is a subject that’s always been controversial because it’s so significant — it’s about how we understand the last chapter of the peopling of the world,” said Thomas Urban, an archaeological scientist at Cornell University, who was involved in the 2021 study but not the new one. The new study isolated about 75,000 grains of pure pollen from the same sedimentary layer that contained the footprints.
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Further evidence points to footprints in New Mexico being the oldest sign of humans in AmericasNew research shows that fossil footprints discovered at the edge of an ancient lakebed in New Mexico's White Sands National Park date back to between 21,000 and 23,000 years ago
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Further evidence points to footprints in New Mexico being the oldest sign of humans in AmericasNew research shows that fossil footprints discovered at the edge of an ancient lakebed in New Mexico's White Sands National Park date back to between 21,000 and 23,000 years ago.
Consulte Mais informação »
Further evidence points to footprints in New Mexico being the oldest sign of humans in AmericasNew research shows that fossil footprints discovered at the edge of an ancient lakebed in New Mexico's White Sands National Park date back to between 21,000 and 23,000 years ago. Previously, archaeologists thought human ancestors arrived about 15,000 years ago. The research was published Thursday in the journal Science. Scientists analyzed conifer pollen and quartz grains found at the site to reach date estimates. Earlier research that analyzed seeds of aquatic plants found at the site also produced similar date estimates. Ancient humans at White Sands lived alongside giant ground sloths, bison and other megafauna.
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Further evidence points to footprints in New Mexico being the oldest sign of humans in AmericasNew research shows that fossil footprints discovered at the edge of an ancient lakebed in New Mexico's White Sands National Park date back to between 21,000 and 23,000 years ago.
Consulte Mais informação »
Lithium Americas wraps up reorganisationLithium Americas, now Lithium Americas (Argentina) and a new Lithium Americas (NewCo) on Tuesday jointly announced the completion of the reorganisation of Lithium Americas into two independent publicly traded companies. “We look forward to seeing these two market-leading companies thrive independently,” said Lithium Americas (NewCo) president and CEO Jonathan Evans.
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Mexico flags plan after Grupo Mexico's chemical spill efforts deemed insufficientMexican President Andres Manuel Lopez Obrador said on Wednesday he hoped to have a proposal within 15 days regarding a 2014 chemical spill in the Sonora River by mining and transportation conglomerate Grupo Mexico .
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