In the British comedy Wallace and Gromit, Gromit is gifted with high-tech trousers and boots that let him walk on walls. The show may have just been a cute Claymation, but the producers were on to something. Physics students at the University of Leicester in the United Kingdom have calculated that it’s possible to have suction boots with vacuums so that wearers can walk on walls, NBC News reports. Unfortunately, they’re just not practical; the battery power to operate the shoes would run out in 20 minutes.
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