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Where were Denisovan fossils and DNA first discovered?

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Denisovan fossils and DNA were first discovered at Denisova Cave (also known as Aju-Tasch), located in the Altai Mountains of Siberia, Russia.12

The initial evidence consisted of a finger bone found in 2008, from which scientists successfully sequenced mitochondrial DNA in 2010. Additionally, a tooth excavated from the same cave in 2000 was later identified as belonging to a Denisovan individual. These findings revealed that the Denisovans were a distinct group of archaic humans who were genetically separate from both Neanderthals and modern humans.12