The issue focused on how long can life support cells stay alive for in very hot conditions.But how much longer can these cells survive in some extreme conditions?What we know about 'green cell' survivalAnd what could this mean for research into drugs that might help save human lives?To test this, scientists from several institutions set up an experiment in an artificial laboratory in Boston. One day the cells were pulled out of the fridge and placed on a cooling tray to cool down to -149C."We started at