Most of us think of death as something clear-cut, and that medical science has it neatly figured out. This feature documentary explodes such assumptions through its exploration of a phenomenon that blurs life and death to an unprecedented degree. In what Tibetan Buddhists call tukdam, advanced meditators die in a consciously controlled manner. Though dead according to our biomedical standards, they often stay sitting upright in meditation; remarkably, their bodies remain fresh and lifelike, without signs of decay for days, sometimes weeks a...