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The Fastest Human-Made Object Ever

The record for the fastest thing ever created by humans is a tie between the Helios 2 probe… and a manhole cover.

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Sources:
http://savvyparanoia.com/the-fastest-man-made-object-ever-a-nuclear-powered-manhole-cover-true/
http://nuclearweaponarchive.org/Usa/Tests/Plumbob.html
https://what-if.xkcd.com/35/
http://www.aerospaceweb.org/question/spacecraft/q0109c.shtml
http://solarprobe.gsfc.nasa.gov/
http://solarprobe.jhuapl.edu/mission/
http://blogs.scientificamerican.com/life-unbounded/the-fastest-spacecraft-ever/

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