新研究集中于与人类进化史相关的一些最具说服力的特征:如大脑,骨盆,手和脚。
The brain itself does not fossilise, but the inside of the cranium retains an impression of itscontours.
大脑本身不会变成化石,但它在颅骨内保留的轮廓特征仍依稀可见。
The researchers mapped these with high-powered X-ray beams to create a three-dimensional model of the surface of sediba s brain.
研究人员采用高功率X射线束对其进行映射并绘制出sediba大脑表面的三维模型图。
They found that its size was on a par with other australopithecines, but its shape was morelike that of a human brain.
他们发现sediba脑部大小与其它南方古猿并无分别,但形状却更接近人脑。
Specifically, the frontal lobes, which are the seat in modern humans of higher cognitivefunctions such as abstract reasoning, looked more humanlike in sediba s brain than they doin the brains of other australopithecines.
尤其是作为人类抽象推理等高认知功能区域的脑前叶部分,sediba比其它南方古猿更象人类。
That suggests the neurological changes which gave rise to humanity may have predated thebrain s expansionan event that had, hitherto, been regarded as crucial to theemergence of humans.
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