[konart]

>Slow down human body metabolism and allow humans to stay asleep at near-freezing temperatures for a long time. If bears and chipmunks can do it, chances are humans could learn it, too.

The thing is - our current bodies can't live in space for long. So either we will have to build new bodies for us somehow or build a ship that can have gravity inside and protection from space outside (and we are talking about very heavy protection here)

In any other case there is no point in slowing down metabolism or whatever. You will die rather soon.

[nine_k]

With a big enough ship, pseudo-gravity can be easily produced by rotation, especially if we expect the crew to spend 95% of time asleep.