SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
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Denisova cave excavation. Archaeologists working at an excavation at the Denisova Cave, Siberia, Russia. The Denisova Cave is the site where Palaeolithic hominid bone fragments belonging to a possible new species of the Homo genus were found. The remains were from a number of similar individuals, and the original specimen became known as the Denisova hominin, or X-woman (referring to the maternal descent of mitochondrial DNA). These and other artifacts dating from around 40,000 years ago were found in the Altai Krai region, an area thought to be inhabited concurrently in the past by Neanderthals and modern humans. Photographed in 2011.
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