alt Hacker NewsFor those unaware: https://en.wikipedia.org/wiki/Operation_Plumbbob
Most people agree that the manhole cover would have been vaporized during its atmospheric ascent portion of flight, but I still like to believe that somewhere out there in the void, a small blob of molten steel that survived the atmosphere is drifting in solar orbit.
Perhaps it's going even faster, and one day will zoom through someone else's stellar system. And they'll rack their brains over what this weird misshaped metallic radioactive object means, where it's coming and where it's going to.