Suspended animation with low body temperatures is very common. I've undergone it myself for several hours. But it's very difficult, expensive and takes a lot of

Suspended animation with low body temperatures is very common. I've undergone it myself for several hours. But it's very difficult, expensive and takes a lot of resources. I venture to say that 'easy' suspended animation (as shown in sci-fi movies) is one of those things that will be unobtainable for long-term use for quite a long time in the foreseeable future.