Scientists revived brain activity in frozen mouse tissue using a glass-like freezing method, hinting that cryosleep and long-term organ preservation may one day be possible. Put “Alien” on standby — because science may be inching a tiny step closer to real-life cryosleep. In a breakthrough that sounds ripped straight from a Ridley Scott flick, researchers in Germany have managed to freeze brain tissue to ultra-cold tempe... [4032 chars]