What I’ve noticed on two Samsung phones, my dad’s and my wife’s aunt’s, is that the Samsung messaging app silently fails and some messages don’t get sent or received. I’m not sure if it has anything to do with the OS of the user on the other end, but in my dad’s case he wasn’t getting messages from my mom who has an iPhone. Switching them to the Google Messages app solved the problem.

Hashtags good.

Why can’t it stay liquid?

Water doesn’t have to be a liquid, but don’t actual spacecraft typically contain liquids during wall of those cases? What do you mean?

Since the astronauts need water to survive, why not line the spaceship with reservoirs of it to provide the shielding? Or does water not block space radiation well enough?