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No, its not possible may be due to evolution it may happen in future. NASA is investigating about possible induced hibernation for astronauts for very long space journeys. There are two incidents in the past supporting human hibernation, one from Japan & another one from Alberta, Canada. You can go into a coma, but you can't choose when to come out and you probably won't survive. 1 person lived for 42 years in a coma.

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12y ago

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