Human evolution: More about Denisovans (Introduction)

by David Turell , Wednesday, January 30, 2019, 18:44 (1907 days ago) @ David Turell

The only cave which had them is revealing new secrets:

https://phys.org/news/2019-01-reveal-deep-history-archaic-humans.html

"Situated in the foothills of Siberia's Altai Mountains, it is the only site in the world known to have been occupied by both archaic human groups (hominins) at various times.

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"The new studies show that the cave was occupied by Denisovans from at least 200,000 years ago, with stone tools in the deepest deposits suggesting human occupation may have begun as early as 300,000 years ago. Neanderthals visited the site between 200,000 and 100,000 years ago, with "Denny", the girl of mixed ancestry, revealing that the two groups of hominins met and interbred around 100,000 years ago.

"Most of the evidence for Neanderthals at Denisova Cave falls within the last interglacial period around 120,000 years ago, when the climate was relatively warm, whereas Denisovans survived through much colder periods, too, before disappearing around 50,000 years ago.

"Modern humans were present in other parts of Asia by this time, but the nature of any encounters between them and Denisovans remains open to speculation in the absence of any fossil or genetic traces of modern humans at the site.

"The Oxford team also identified the earliest evidence thus far in northern Eurasia for the appearance of bone points and pendants made of animal teeth that are usually associated with modern humans and signal the start of the Upper Palaeolithic. These date to between 43,000 and 49,000 years ago.

"So, 'while these new studies have lifted the veil on some of the mysteries of Denisova Cave, other intriguing questions remain to be answered by further research and future discoveries' said Professor Richard 'Bert' Roberts, a co-author on the two papers.

"Professor Higham commented that 'it is an open question as to whether Denisovans or modern humans made these personal ornaments found in the cave. We hoping that in due course the application of sediment DNA analysis might enable us to identify the makers of these items, which are often associated with symbolic and more complex behaviour in the archaeological record'."

Comment: All of this new Homo species is because genetic analysis tells us they are a separate group. Were they a very small group? Time and discoveries will tell.