March 31, 2017
When I read that astronauts had patched up the space station after a piece of cloth shielding had floated away, I thought about who might encounter that piece of cloth someday, and what they’d make of it. Then I started to wonder:
If there is life elsewhere in space, where’s the junk?
Presumably, if they’re sophisticated enough to travel from other solar systems or galaxies, they know enough by now to pick up their trash.
But in the early days, they may have left a lot of junk in space, just like we're doing.
So where is it? Will it float our way eventually? Will THAT be our first indication of life on other planets?