Reviving samples of mouse brain could bring us closer to freezing whole brainsBSIP SA / AlamySlices of mouse brain that were kept at -150C for up to a week have shown near-normal electrical activity after being warmed up. The results could take us a step closer towards cooling and reviving entire brains for purposes such as putting people in suspended animation for space flights.At the moment, it is not possible, but I think there are existing techniques that can be combined to achieve this, and there is room for careful optimism, says Alexander German at