Scientists have mapped the complex brain of the fruit fly, Drosophila melanogaster, detailing over 140,000 neurons and 490 feet of wiring. Published in Nature, this is the first complete map of a complex brain, surpassing previous work on a worm with 385 neurons. The research could reveal principles applicable to other species, including humans. A computer simulation of the fly brain demonstrated sensory processing, hinting at future possibilities like “mind uploading.” This breakthrough aids long-standing studies of the fly’s nervous system.