Okay, I feel better...

... about my stumblings with respect to Hideous Radiation Problems in space travel. I have just read that in the TV series "Jericho", apparently radioactive fallout carried down by rain becomes harmless once it's in puddles on the ground.

This goes beyond merely insulting one's intelligence and all the way to assaulting one's intelligence, violating it, and leaving it sobbing and broken on the ground.