There’s an urban legend that dates back to when the US was testing nuclear bombs underground, one of the bombs tested had its strength miscalculated, causing the welded manhole cover to be launched with so much force that the it reached 6 times the speed of Earths escape velocity (which is 25,000 Mph). Curious about which man-made objects have reached the fastest speed, we’ve visualised out findings!
https://www.jpl.nasa.gov/infographics/infographic.view.php?id=11489