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kottke.org posts about Denisovans

Ancient Denisovan/Neanderthal human-hybrid discovered

posted by Jason Kottke   Aug 23, 2018

Wow! Genetic analysis of a human bone fragment found in Siberia reveals that her parents belonged to two different groups of humans: her father was Denisovan and her mother Neanderthal.

A female who died around 90,000 years ago was half Neanderthal and half Denisovan, according to genome analysis of a bone discovered in a Siberian cave. This is the first time scientists have identified an ancient individual whose parents belonged to distinct human groups. The findings were published on 22 August in Nature1.

“To find a first-generation person of mixed ancestry from these groups is absolutely extraordinary,” says population geneticist Pontus Skoglund at the Francis Crick Institute in London. “It’s really great science coupled with a little bit of luck.”

Luck is right…what a needle in a haystack.

The human family grows

posted by Jason Kottke   Dec 02, 2014

A new analysis of the genomes of two extinct human species (Neanderthals and Denisovans) shows more clearly that they interbred with our species of human, contributing 2-4% of our modern genomes in some cases.

“What it begins to suggest is that we’re looking at a Lord of the Rings-type world — that there were many hominid populations,” says Mark Thomas, an evolutionary geneticist at University College London who was at the meeting but was not involved in the work.

But, more interestingly, the analysis also detected the Denisovans also bred with an as-yet-unknown species of humans.

The Denisovan genome indicates that the population got around: Reich said at the meeting that as well as interbreeding with the ancestors of Oceanians, they also bred with Neanderthals and the ancestors of modern humans in China and other parts of East Asia. Most surprisingly, Reich said, the genomes indicate that Denisovans interbred with yet another extinct population of archaic humans that lived in Asia more than 30,000 years ago — one that is neither human nor Neanderthal.

Is this the first time a new human species has been discovered through DNA evidence alone?