Hibernating astronauts are a staple of science fiction. Now it appears they're one step closer to reality, and you won't believe the cause:
Suspended animation has been deliberately induced in a species of mouse which does not naturally hibernate. It is the first time such a feat has been achieved, say the procedure’s pioneers.
The mice were induced to fall into their deep sleep after being exposed to hydrogen sulphide - the gas which gives rotten eggs and stink bombs their characteristic foul odour. The animals later revived in ordinary air.