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A former NASA engineer in California posted a video showing his latest world-changing accomplishment: the world's largest functioning Nerf gun. Mark Rober, a former NASA engineer who spent seven years on the Curiosity Rover project, posted a video to YouTube showing his much larger recreation of a classic Nerf pistol that shoots oversize darts distances of more than 130 yards. Rober's gun, which is powered by a 3000 psi paintball tank, shoots darts made from pool noodles and toilet plungers. The video shows Rober compare the effects of his creation to a normal-size Nerf pistol wielded by a friend. "I made the world's largest Nerf gun to defend my honor," Rober wrote in the video's description.