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New World's Oldest Skeleton Is a Key Genetic Link

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楼主
发表于 5-21-2014 18:44:13 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 choi 于 5-21-2014 18:45 编辑

Robert Lee Hotz, New World's Oldest Skeleton Is a Key Genetic Link; Remains found in Mexico connect earliest settlers with continent's natives. Wall Street Journal, May 16, 2014.
online.wsj.com/news/articles/SB10001424052702303908804579563971867031520

two consecutive paragraphs:

“She doesn't look very much like a contemporary Native American. Her face instead resembles a modern African, indigenous Australian or Pacific Islander, the scientists said. Such differences have fueled theories that these first paleo-Americans and modern Native Americans have no kinship.

“Yet by the evidence of her maternal DNA [in mitochondria] she is the ancestor of many Native Americans alive today, the researchers said. They share a unique genetic signature, called haplogroup D1, today found only in the indigenous people of the Americas, the researchers said.

Note:
(a)
(i) Chatters MC et al, Late Pleistocene Human Skeleton and mtDNA Link Paleoamericans and Modern Native Americans. Science, 344: 750-754 (May 16, 2014).
www.sciencemag.org/content/344/6185/750
(ii) Beneath the abstract in the above link is a perspective for the laypesons.

Michael Balter, News & Analysis: Bones From a Watery 'Black Hole' Confirm First American Origins. Science, 344: 680-681 (2014)
www.sciencemag.org/content/344/6185/680.full

Quote:

“In May 2007, Alberto Nava, a diver based in California, was exploring an underwater cave in Mexico's Yucatán Peninsula with two Mexican colleagues. They swam more than a kilometer down a narrow tunnel, which suddenly opened up into a huge, dark chamber. "The floor disappeared under us and we could not see across to the other side," Nava says. They dubbed the chamber Hoyo Negro, Spanish for ‘black hole.’  About 2 months later, the threesome returned to Hoyo Negro to explore it further with powerful underwater lights, revealing a bell-shaped amphitheater some 60 meters in diameter.

“They [anthropologists] say it serves mostly as confirmation of a recent, major study reporting the complete nuclear genome sequence of the 12,700-year-old Anzick child from Montana.

* Rasmussen M et al, The Genome of a Late Pleistocene Human From a Clovis Burial Site in Western Montana. Nature, 506: 225-229 (Feb 13, 2014)
www.nature.com/nature/journal/v506/n7487/full/nature13025.html
, where “Ansick SL” is the second author.
* There is no need to read the perspective if you (a non-subscriber) have no access to it.
(b) Yucatán Peninsula
en.wikipedia.org/wiki/Yucatán_Peninsula
(section 1 Etymology)
(c) “As a specimen, the [12,000-year-old] skeleton, belonging to a girl 15 or 16 years old, was formally designated HN5/48, but those who handled her bones have nicknamed her Naia, after the water nymphs of Greek mythology.”

Naiad
en.wikipedia.org/wiki/Naiad
(Naiads were a type of water nymphs; section 1 Name: to flow; section 6 Names: Naia [being one of them])
(d) “They [divers who discovered the now submerged cave] named the cavern Hoyo Negro—’the black hole.’"

Spanish English dictionary:
(i) hoyo (noun masculine): "hole"
en.wiktionary.org/wiki/hoyo
(ii) negro (noun or adjective, masculine): "black”
en.wiktionary.org/wiki/negro
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沙发
 楼主| 发表于 5-21-2014 18:44:40 | 只看该作者
Early Americans | History in a Black Hole; A new fossil helps understanding about how the Americas were colonised. Economist, May 17, 2014.
www.economist.com/news/science-a ... e-colonised-history

two consecutive paragraphs:

“Her skull is Palaeoamerican, meaning it is part of a small group whose remains do not resemble modern native Americans. Dr Chatters excavated the most famous of these, Kennewick man, in 1996. Kennewick man caused a stir in 2004 when local native Americans tried (but failed) to claim him as an ancestor and to rebury his remains away from prying scientists.

“Palaeoamericans have longer, narrower craniums than modern native Americans, and their faces are smaller and project forward more. Their teeth have different shapes, too.

Note:  Kennewick Man
en.wikipedia.org/wiki/Kennewick_Man
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