TEXT ONE
If you found yourself in a cocktail bar with a Neanderthal man, what would he say? A good conversation is one of the great joys of being human, but it is not clear just how far back in the hominid lineage the ability to use language stretches. The question of when grunts and yelps turned into words and phrases is a tricky one. One way of trying to answer it is to look in the fossil record for evidence about what modern humanitys closest relatives could do.
Svante P bo, of the Max Planck Institute for Evolutionary Anthropology in Leipzig, and his colleagues have done just that. Dr P bo is an expert in extracting and interpreting the DNA of fossils. As he reports in the latest issue of Current Biology, he and his team have worked their magic on a gene called FOXP2 found in Neanderthal remains from northern Spain. The reason for picking this particular gene is that it is the only one known so far to have a direct connection with speech. In 1990, a family with an inherited speech disorder known as verbal dyspraxia drew the attention of genetics researchers. Those researchers identified a mutation in FOXP2 as the cause of the dyspraxia.
Since then FOXP2 has been the subject of intensive study. It has been linked to the production of birdsong and the ultrasonic musings of mice. It is a conservative type, not changing much from species to species. But it has undergone two changes since humans split from chimpanzees 6m years ago, and some researchers believe these changes played a crucial role in the development of speech and language.
If these changes are common to modern humans and Neanderthals, they must predate the separation of the line leading to Homo sapiens from the one leading to Homo neanderthalensis. Dr P bos research suggests precisely that: the FOXP2 genes from modern humans and Neanderthals are essentially the same. To the extent that the gene enables language, it enables it in both species.
There has been much speculation about Neanderthals ability to speak. They were endowed with a hyoid bone, which anchors the tongue and allows a wide variety of movements of the larynx. Neanderthal skulls also show evidence of a large hypoglossal canal. This is the route taken by the nerves that supply the tongue. As such, it is a requisite for the exquisitely complex movements of speech. Moreover, the inner-ear structure of Homo heidelbergensis, an ancestor of Neanderthals, shows that this species was highly sensitive to the frequencies of sound that are associated with speech.
That Neanderthals also shared with moderns the single known genetic component of speech is another clue that they possessed the necessary apparatus for having a good natter. But suggestive as that is, the question remains open. FOXP2 is almost certainly not the language gene . Without doubt, it is involved in the control and regulation of the motions of speech, but whether it plays a role in the cognitive processes that must precede talking remains unclear jokes about engaging brain before putting mouth in gear notwithstanding. The idea that the forebears of modern humans could talk would scupper the notion that language was the force that created modern human culture otherwise, why would they not have built civilisations? But it would make that chat with a Neanderthal much more interesting.
GRE写作绝佳300句(三十)
GRE Issue技术话题写作提纲
GRE Issue教研实践活动话题写作提纲
新版GRE写作新题库:Argument45
新版GRE写作新题库:Argument73
GRE写作绝佳300句(二六)
新版GRE写作新题库:Argument67
新GRE写作须知:必备经典句型2
GRE Issue写作范文详细解析(4)
GRE Argument实战准备方略
GRE写作绝佳300句(二五)
新版GRE写作新题库:Argument63
gre写作中文特色词汇
新版GRE写作新题库:Argument64
新版GRE写作新题库:Argument62
新版GRE写作新题库:Argument44
GRE写作绝佳300句(二八)
GRE写作冲刺经验
GRE Issue关于发展全球性大学的写作提纲
新版GRE写作新题库:Argument61
新版GRE写作新题库:Argument55
GRE Issue写作范文详细解析(3)
新版GRE写作新题库:Argument71
GRE写作绝佳300句(二四)
新GRE写作须知:必备经典句型1
GRE作文典型句摘录
新版GRE写作新题库:Argument72
新版GRE写作新题库:Argument41
新版GRE写作新题库:Argument42
新版GRE作文新题库解析-issue118
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |