#Person looking through telescope drawing skin#
They weighed more than a thousand pounds (450 kg) and their skin included bony structures under their fur - somewhat similar to the bony plates of modern armadillos. Once among the largest creatures in South America, giant ground sloths were 10 to 13 feet (3 to 4 meters) in length and usually walked on all four legs, using their sharp claws to dig burrows. “We think they were personal objects, possibly for personal adornment,” said Thais Rabito Pansani, a co-author and paleontologist at the Federal University of Sao Carlos in Brazil. They reported their findings Wednesday in Britain’s Proceedings of the Royal Society B journal. The researchers also ruled out natural abrasion and other things that might explain the shapes and holes. The team of researchers from Brazil, France and the United States said their analysis shows this handiwork was done within days to a few years after the animals had died, and before the materials had fossilized. The new study is the first to analyze them extensively and rule out the possibility that humans had found and carved them thousands of years after the animals perished. The ornaments were discovered about 30 years ago at a rock shelter called Santa Elina in central Brazil.
In the past decade, other research has challenged the conventional wisdom that people didn’t reach the Americas until a few thousand years before rising sea levels covered the Bering land bridge between Russia and Alaska, perhaps around 15,000 years ago. “We now have good evidence - together with other sites from South and North America - that we have to rethink our ideas about the migration of humans to the Americas,” said Mirian Liza Alves Forancelli Pacheco, a study co-author and archaeologist at the Federal University of Sao Carlos in Brazil.
That’s several thousand years before some earlier theories had suggested the first people arrived in the Americas, after migrating out from Africa and then Eurasia. They concluded that the carved and polished shapes and drilled holes were the work of deliberate craftsmanship.ĭating of the ornaments and sediment at the Brazil site where they were found point to an age of 25,000 to 27,000 years ago, the researchers reported. Scientists analyzed triangular and teardrop-shaped pendants made of bony material from the sloths. New research suggests humans lived in South America at the same time as now extinct giant sloths, bolstering evidence that people arrived in the Americas earlier than once thought.
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