Credit: CENIEH
Posted on 01/01/2020 9:06:58 PM PST by SunkenCiv
The journal PNAS has recently published an article... which refutes the similarities between the teeth of modern Asians and the Denisovans, an extinct human population that coexisted with Homo Sapiens and Neanderthals and whose DNA is present in 4-6 percent of the current populations of Australia, Melanesia and Papua New Guinea...
The study, by the paleoanthropologist María Martinón-Torres and two other dental specialists, Richard Scott from the University of Reno (U.S.) and Joel Irish from the University of Liverpool (UK), refutes this conclusion.
On one hand, the high frequencies of molars with three roots in Asian populations refers to the first molar, not the second. Even in the groups with the highest frequency of molars with three roots in the world, the Aletus, this feature is present in 40.7 percent of first molars but only 1.9 percent in second molars. Therefore, the comparison of the frequencies of the Xiahe feature with modern populations would be based on the "wrong tooth."
On the other hand, the detailed morphological study of the Denisovan molar from Xiahe reveals that, although they have three roots, their configuration is different than it is in modern human populations and tends to be more frequent among Asians. The third root is not only different with regards to its size and shape, but also its position. In other words, the genetic variation that caused it to develop three roots in Xiahe is probably different to that which caused molars with three roots in modern populations, predominantly from Asia.
(Excerpt) Read more at phys.org ...
Credit: CENIEH
A study refutes the similarities between the teeth of Denisovans and modern Asians..
My whole life was based on that!!
To see it refuted...well....bad new year already.
:)
That was interesting and enlightening.
You’ve done yet again SunkenCiv.
Happy New Year!
So the descendents of those who interbred with denisovans, the australoid peoples, were pushed south by newer waves of homo homo sapiens. Interesting, thank ýou
Good God!!! Is that a human mouth?!?!
Wonder if this is study is the whole tooth?
I'm sure they did, as I'm sure that the Denisovans weren't confined or centered in the area where they were first identified. Also, I don't think much of this refutational study, looks like the opening salvo of a pissing contest. :^)
I'm molar interested in their spoken tongue.
Their parents hate them. Horrid nutrition is a choice, even if poor. Grow onions and greens out your back door, already.
And there might be a political reason protein isn’t more available.
Denisovan dentists must have also been geneticists who were experts at doing root canals... three root canals for the price of two. Unhappily, their dental chairs were made of stone.
I had a three-root molar pulled in Jr High before I got braces. The orthodontist was pretty dang confused by it. As far as I know I’m neither Asian nor Denisovan.
I've got to clean my glasses, on my first pass I thought that said "three-foot molar". That would puzzle anybody, not just the dentist. :^)
I wonder if anyone in modern times has tried making tooth drill bits out of obsidian?
I do not really know, but in modern terms obsidian is 5 on the Mohs Scale and of course diamond is 10 - for what it is worth. {tooth enamel is also 5}
Thanks!
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