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Scientists complete the first full wiring diagram of a fruit fly brain

Popkin
Feb 25, 2026
∙ Paid

New World screw-worm fly (Rmd_17/shutterstock.com)

Scientists have completed the most detailed map ever made of an adult animal brain by charting every cell and connection in a fruit fly’s brain (the fly brain map is ridiculously cool-looking). Despite being smaller than a pinhead, the fly’s brain contains about 130,000 neurons and 50 million connections…

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