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Attendees cheer during a Sperm Racing competition in Los Angeles, California on April 25, 2025. At the Los Angeles event on Friday night, a man in a lab coat used pipettes to place samples of semen – collected from contestants ahead of time – onto tiny two-millimeter-long “tracks”. The race track is magnified 100 times by a microscope, then filmed by a camera that 17-year-old high schooler Eric Zhu says transfers the image to a 3D animation software before the final video is broadcast to the audience. The unusual sport was invented by Zhu, who raised over a million dollars to organize the event to raise awareness of male infertility. (Photo by Patrick T. Fallon/AFP Photo)
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