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「北京人」二、三事 -- O. Jarus
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'Peking Man' Was a Fashion Plate

 

Owen Jarus, LiveScience Contributor, 12/31/12

 

"Peking Man," a human ancestor who lived in China between roughly 200,000 and 750,000 years ago, was a wood-working, fire-using, spear-hafting hominid who, mysteriously, liked to drill holes into objects for unknown reasons.

 

And, yes, these hominids, a form of Homo erectus, appear to have been quite meticulous about their clothing, using stone tools to soften and depress animal hides.

 

The new discoveries paint a picture of a human ancestor who was more sophisticated than previously believed.

 

Peking Man was first discovered in 1923 in a cave near the village of Zhoukoudian, close to Beijing (at that time called Peking). During 1941, at the height of World War II, fossils of Peking Man went missing, depriving scientists of valuable information.

 

Recently, researchers have embarked on a re-excavation of the cave site searching for artifacts and answers as to how the Peking Man lived. Just as importantly, they engaged in new lab work that includes using powerful microscopes to look at artifacts made by Peking Man to determine how they were used, a process archaeologists called "use-wear" analysis.

 

On Dec. 15, four of these scientists gathered at Toronto's Royal Ontario Museum to give an update on their most recent findings. Three of the scientists, Xing Gao, Yue Zhang and Shuangquan Zhang are with the Chinese Academy of Science's Institute of Vertebrate Palaeontology and Palaeoanthropology. The fourth, Chen Shen, is a curator at the Toronto museum and a special member of the academy.

 

Among their archaeological findings is a 300,000-year-old "activity floor" (as the scientists call it) containing what may be a hearth and fireplace, akin to a prehistoric living room. Analysis is ongoing and Yue Zhang noted that 3D scanners are being used to map it. If the results hold up, it may prove once and for all that Peking Man was able to control fire, an important skill given the chilly weather at times in northern China. [The 10 Biggest Mysteries of the First Humans]

 

Spear discovery

 

The use-wear analysis of Peking Man's tools yielded several interesting finds. Chen Shen said that analysis of the base of Peking Man's stone tools reveal that the hominid "likely" attached stone points to sticks creating a sort of spear. It's an important step in human development as it involves putting two materials, the stone tip and stick, together to form a composite tool.

 

Scientists are still trying to determine the details. For instance, Shen said it is possible that Peking Man was making spears with short sticks. While not as useful for hunting, the short stick would act as "an extension of the tool," and "you can hold it while you are scrapping or engraving," Shen said in an interview with LiveScience. Researchers are also trying to determine whether Peking Man used some form of sticky organic material to aid in the process of hafting a spear.

 

Another question is how this fits, chronologically, with other recent prehistoric findings. Just last month, scientists working in South Africa reported in the journal Science that another hominid named Homo heidelbergensis was making spears500,000 years ago (in its case likely to hunt animals). This leaves researchers with the question whether Peking Man, a different hominid, started making spears at around the same time.

 

More mysteries

 

The team also found evidence through the use-wear analysis that Peking Man was working wood (which didn't preserve in the cave) with their stone tools, possibly to turn it into wooden tools.

 

Perhaps the strangest finding was evidence for "drilling." Shen explained they don't know what the hominids were drilling into, or why, but they were certainly engaging in it with their stone tools. There is no evidence so far that Peking Man made ornaments or what we would consider art.

 

Finally, the analysis shows that Peking Man had an interest in clothes. "A certain proportion of tools were being used for the working and scraping of hides," Shen said in the interview..

 

"If they are depressing the hides, if they are softening hides, they can use the hides for their clothes," something no sophisticated hominids would dare live without.

 

Follow LiveScience on Twitter @livescience. We're also on Facebook & Google+.

 

 

Copyright 2012 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

 

http://news.yahoo.com/peking-man-fashion-plate-191530302.html

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5 things you probably didn't know about Neanderthals

 

Keith Wagstaff, 03/21/13

 

Neanderthals had family sex, great eyes, and a terrible time hunting varmints

 

Our thick-browed, extinct friends known as the Neanderthals have been all over the news lately. The latest find? Scientists at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, have sequenced and published a high-quality Neanderthal genome taken from a toe bone found in a Siberian cave, reports the Associated Press. In celebration of the breakthrough, here are 5 fascinating things about Neanderthals that you may not have known:

 

1.     They kept sex all in the family


When scientists put a 100,000-year-old skull from China’s Nihewan Basin together, they found something curious on top of it -- a hole. An uncovered "soft spot" should be rare, yet researchers have found 22 Neanderthal skulls with a similar defect, leading them to believe that "the simplest explanation is that small and unstable human populations forced our ancestors to inbreed," according to Smithsonian Magazine. Yes, inbreeding is normally linked to cognitive problems, but it's better than watching your species die out in the icy Pleistocene era. You know what they say: If you can't be with the one you love, breed with the one you're with.

SEE MORE: Is the CIA drone program coming to an end?

 

2.     They had great vision and terrible social skills

Neanderthals' brains were about the same size as our own. So why weren't they able to adapt? A study led by Robin Dunbar of the University of Oxford found a possible answer in their large eye sockets. Neanderthals may have been forced to devote a lot of their brain power to their eyesight to see in the dim, foggy north. It's possible that it limited the development of their frontal lobes, making it so "they could only maintain a social group size of around 115 individuals, rather than the 150 that we manage," according to New Scientist.

If they had been able to socialize better, they might have survived. Dunbar's colleague, Eiluned Pearce, told Discovery News that "smaller social groups might have made Neanderthals less able to cope with the difficulties of their harsh Eurasian environments because they would have had fewer friends to help them out in times

 

3.     They had trouble catching pesky rabbits -- possibly a fatal flaw

Neanderthals were great at hunting mammoths. Rabbits? Not so much. That's the conclusion reached by John Fa, biologist at the United Kingdom's Durrell Wildlife Conservation Trust, who found that rabbit remains only started showing up in Europe 30,000 years ago -- around the time Neanderthals started to disappear and our human ancestors started taking their place. The study points out that "as climate change or human hunting pressure whittled down populations of Iberian large animals such as woolly mammoths, rabbits would have become an increasingly important food resource," according National Geographic. For whatever reason, the theory goes, Neanderthals couldn't adjust.

 

4.     Scientists think we could bring them back to life

That genome data in Germany could come in handy if scientists ever want to bring a Neanderthal back to life. According to National Geographic, we could do it by embracing the Jurassic Park method: Tweak a human cell to match Neanderthal DNA, and implant it in a chimp or human mother. "Going from engineered cells to whole organism has been especially well established in mice, and [there's] no obvious reason why it would fail in other mammals," Harvard geneticist George Church tells National Geographic. We assume they will all look and act like Saturday Night Live's Unfrozen Caveman Lawyer.

 

SEE MORE: Today in business: 5 things you need to know

 

5.     They were extreme travelers

You wouldn't think that short, big-boned Neanderthals would do a lot of running and walking, but a new study suggests that they covered a lot of ground. According to ScienceNews, the study found "a dearth of older individuals in fossil samples suggesting that life spans were limited due to the rigors of constant travel, and an absence of skeletal injuries in excavated fossils that would have prevented vigorous movement." A possible reason for all that roaming: They were looking for suitable rocks to put on the ends of their spears, says David Nash of the University of Brighton.

 

View this article on TheWeek.com Get 4 Free Issues of The Week

 

Other stories from this section:

 

·          Why Obama wants to map the human brain

·          Russia's massive meteorite: By the numbers

·          Everything you need to know about meteor strikes

 

http://news.yahoo.com/5-things-probably-didnt-know-neanderthals-192500342.html



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