Scientists discover why humans have such big brains
by Ian Sample Science editor from Science | The Guardian on (#5FR0E)
Molecular switch makes human organ three times larger than great apes', study finds
It is one of the defining attributes of being human: when compared with our closest primate relatives, we have incredibly large brains.
Now scientists have shed light on the reasons for the difference, by collecting cells from humans, chimps and gorillas and turning them into lumps of brain in the laboratory.
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