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A laser beam can alter a fly’s behavior and make it mate with just about anything — even a ball of wax, according to scientists at the Howard Hughes Medical Institute. The researchers have developed an experiment which involves shining an infrared laser directly at the head of a fly whose brain has been altered using heat-activated proteins. This alteration allows the laser, dubbed the "Fly Mind-Altering Device" (FlyMAD), to activate specific neurons involved in mating.

behavioral modification was so strong that it persisted for about 15 minutes after the laser was turned off.