
I'm not concerned about contaminating space. I was pointing out that radioactive waste within the lifespan of earth could be one of the signs that humans once lived here
That, and the bones of the royals
( , Wed 9 Nov 2022, 17:35, Reply)

which is why I said that we have left stuff on the moon. Hard evidence that will last a long time.
( , Thu 10 Nov 2022, 0:17, Reply)