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Robert Krulwich: Welcome to NOVA scienceNOW, a new series airing on PBS. I'm your host, Robert Krulwich. Now, I know you can't see me now, but if you could, and if I crossed my eyes and then ...

This provocative work examines whether we can slow down the aging process, looks at the latest on human hibernation, and checks in with bioengineers and a computer scientist inventing ways to keep ...