Archaeologists have recently discovered a huge structure built from thousands of bones of dozens of woolly mammoths in Russia. It’s the oldest known structure of its kind and its purpose isn’t entirely clear.
Archaeologists working at the Kostenki 11 site have found the largest and oldest mammoth bone structure in the world: It is a 12.5-meter-wide structure (41-foot) made from hundreds of woolly mammoth bones and the ancient construction is 25,000 years old.
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https://strangesounds.org/2020/03/mysteriouss-ice-age-structure-built-from-bones-of-60-mammoths.html