Categories Articles A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story. Post author By crystalg Post date March 2, 2023 Business Insider Business Insider Tags Cover, Fastest, humanmade, into, launched, Manhole, Nuclear, Object, Operation, Plumbbob, Scientist, space, Story, test, Told, Unbelievable ← TikToker Eating Nothing But McDonald’s For 100 Days Says He’s Losing Weight. ‘From French Fries to Fit Guy.’ → Best Meat Thermometers: Top 5 Kitchen Tools Recommended By Experts