When it comes to brain size, bigger doesn't always mean better.

当涉及到大脑体积，更大并不总是意味着更好。

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They found that brain size decreased as population density increased.

他们发现，大脑的尺寸随着人口密度的增长而减小。

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This study overturns the long-held belief that brain size has increased across all mammals.

这项研究颠覆了我们长久以来的观点，所有哺乳动物的脑的面积都在增加。

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Researchers also looked at brain size as these participants aged.

VOA: standard.2009.12.30

Rather, what determines the size in the brain is the extent to which either they have motor command over it or sensory control.

相反,对运动的控制程度,或是对感觉的控制程度,决定了身体部位在大脑中对应区域的大小

耶鲁公开课 - 心理学导论课程节选

Also, you'll notice that the size of the body part represented in the brain does not correspond to the size of the body part in the real world.

而且你会发现,身体部位在大脑中对应的皮层面积大小,与身体部位的实际大小并不一致

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Among our ancestors, brain size doubled between two million and one million years ago.

BBC: Conflict and 'boom-bust' explain humans' rapid evolution

Brain size, by contrast, and just as predicted, varied in the opposite direction.

ECONOMIST: Bigger testes mean smaller brains

Along with the increase in brain size came a reduction in the size of the teeth and face along with other changes in the skull.

BBC: Conflict and 'boom-bust' explain humans' rapid evolution