They actually aren't very tough unless they are prodded into going into a sort of hibernation called cryptobiosis. If the temperature changes too quickly, they

They actually aren't very tough unless they are prodded into going into a sort of hibernation called cryptobiosis. If the temperature changes too quickly, they die quite easily. https://venturebeat.com/2017/02/24/complicated-weird-beautiful-the-secret-google-project-to-put-an-aquarium-full-of-tiny-wiggly-water-bears-inside-your-phone/ https://venturebeat.com/2017/02/24/complicated-weird-beautif...