Today's story: Scientists have completed a ""connectome"" of an adult fruit fly, mapping all 140,000 brain cells and the 55 million connections between them. The map will allow scientists to study in much greater detail how a brain works. And the complete connectome of the fruit fly may pave the way for mapping larger, more complex brains, including those of mice and, potentially, humans.

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Scientists map a fly's entire brain (On a roll) 20:49 Share

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Scientists map a fly's entire brain (On a roll)