Stories of 'near death experiences' (NDEs) are legion, affecting all cultures and peoples. NDEs have similarities—white lights, tunnels, spirit beings, feelings of unity, comfort, love. Do NDEs 'prove' that 'Heaven is for real'? Or are they mere by-products of shocks to the brain during times of physiological trauma and insults? Is there a science of NDEs?

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Sam Parnia is an Assistant Professor of Medicine at the State University of New York at Stony Brook.

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