Two related fascinating stories of man's ancestors
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10-04-2015, 05:41 PM
Two related fascinating stories of man's ancestors
http://www.nature.com/news/mystery-human...es-1.14196

http://ngm.nationalgeographic.com/2013/0...reeve-text

a small excerpt...

"The year before, two other fossils had been found to contain DNA similar to that of the finger bone, both of them molars. The first tooth had turned up among the specimens from Denisova housed at Derevianko’s institute in Novosibirsk. It was bigger than either a modern human or a Neanderthal tooth, in size and shape resembling the teeth of much more primitive members of the genus Homo who lived in Africa millions of years ago. The second molar had been found in 2010 in the same cave chamber that had yielded the finger bone—indeed, near the bottom of the same 30,000-to-50,000-year-old deposits, called Layer 11.

Remarkably, that tooth was even bigger than the first, with a chewing surface twice that of a typical human molar. It was so large that Max Planck paleoanthropologist Bence Viola mistook it for a cave bear tooth. Only when its DNA was tested was it confirmed to be human—specifically, Denisovan, as the scientists had taken to calling the new ancestors. “It shows you how weird these guys are,” Viola told me at the symposium. “At least their teeth are just very strange.”

Pääbo’s team could extract only a tiny amount of DNA from the teeth—just enough to prove they came from the same population as the finger, though not from the same individual. But the finger bone had been spectacularly generous.

DNA degrades over time, so usually very little remains in a bone tens of thousands of years old. Moreover, the DNA from the bone itself—called endogenous DNA—is typically just a tiny fraction of the total DNA in a specimen, most of which comes from soil bacteria and other contaminants. None of the Neanderthal fossils Pääbo and his colleagues had ever tested contained even 5 percent endogenous DNA, and most had less than one percent. To their amazement, the DNA in the finger bone was some 70 percent endogenous. Apparently, the cold cave had preserved it well.

Given so much DNA, the scientists easily ascertained that there was no sign of a male Y chromosome in the specimen. The fingertip had belonged to a little girl who had died in or near Denisova cave tens of thousands of years before. The scientists had no idea, at first, what she looked like—just that she was radically different from anything else they had ever seen."

thoughts?

"Belief is so often the death of reason" - Qyburn, Game of Thrones

"The Christian community continues to exist because the conclusions of the critical study of the Bible are largely withheld from them." -Hans Conzelmann (1915-1989)
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10-04-2015, 05:50 PM
RE: Two related fascinating stories of man's ancestors
What can I say, I love it. It makes thinhs much more interesting... But again, since Africans are not affected and are essentially the same as Europeans, the influence of these side branches can't be too important?

Quantum Physics: doing the same thing over and over again and expecting different results.
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10-04-2015, 06:06 PM
RE: Two related fascinating stories of man's ancestors
Amazing.
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10-04-2015, 06:14 PM
RE: Two related fascinating stories of man's ancestors
Quote:"What it begins to suggest is that we’re looking at a Lord of the Rings-type world"

I am not disappoint Smartass

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