Top boffins in the States believe that they may be on the track of a way to place living human beings into suspended animation, allowing them to survive long periods effectively frozen before being "reanimated" with no ill effects.
Dr Mark Roth, based at a Seattle cancer laboratory, got interested in suspended animation after looking at several cases where this has occurred spontaneously in humans.
One well-known case is that of Canadian toddler Erica Nordby, who wandered outside in the winter of 2001 wearing only her nappy. In the bitter cold her heart stopped beating for two hours and her body temperature plunged to just 16°C* before she was rescued, warmed - and came miraculously back to life, despite having literally frozen to death.
In another case a Japanese man, Mitsutaka Uchikoshi, fell asleep on a snowy mountainside in 2006. He was found 23 days later with a core body temperature of just 22°C*. He too was successfully reanimated having suffered no appreciable ill effects.
"There are many examples in the scientific literature of humans who appear frozen to death. They have no heartbeat and are clinically dead. But they can be reanimated," says Dr Roth.
Roth and his colleagues wondered how it is that some people can enter a state of frozen suspended animation and then recover from it safely, whereas in general such a change of body temperature is deadly.
The scientists now think they may be on the track of an answer, having learned how to perform the same trick reliably with other lifeforms; in this case yeasts and nematode worms.
Yeasts and worms, like humans, will normally simply die if they are chilled down past a certain point. But Roth and his colleagues have found that if the little creatures are starved of oxygen before turning on the cold, they will go into suspended animation from which they recover on warming and go on to live normal yeasty or wormy lives.
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This is really cool, this might open up new pathways to space travel and various medical breakthroughs. I don't understand how this works, someone dies and then they bring them back to life?
Thoughts?
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