In Pictures: Science vs. fiction: 15 sci-fi technologies that are (almost) here

Science fiction has a rich history of predicting the future. And in some cases, the future is now

Cryonics One of science fiction's oldest ideas is the concept of putting a human body -- or just the head -- into deep freeze for later thawing. In many early sci-fi stories, such suspended animation was used as a kind of poor man's time travel, with frozen adventurers waking up in future worlds. It's such a common trope, in fact, that it's been relentlessly parodied in film (Austin Powers) and TV (Futurama). But the technology is plenty real: Cryonics is the term typically used when referring to the field of cryogenic preservation of human beings. Baseball legend Ted Williams is probably the most famous guy in deep freeze -- just his head, actually -- and there are several commercial cryonic suspension facilities in the...

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