The cryonics dilemma: will deep-frozen bodies be fit for new life?

350 corpses stored in liquid nitrogen await immortality. But detractors say the brain's complexity is a major stumbling block

"My primary strategy for living through the 21st century and beyond is not to die," Ray Kurzweil, the futurologist and Google engineer has said. But in the event that plan A doesn't work out, he has opted to have his body cryogenically preserved at the world's largest facility, the Alcor Life Extension Foundation in Scottsdale, Arizona.

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