When a neurosurgeon claimed he glimpsed the afterlife during a coma, skeptics offered a more earthly interpretation – a surge of DMT produced by his own body. Was his tale of eternity a trick of the brain, or a window into something science can’t explain?

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Co-produced by PRX and the UC Berkeley Center for the Science of Psychedelics, Altered States is an award-winning podcast, taking home a 2025 Signal Award for Science and the 2026 Webby Award for Science and Education. To learn more, visit us our website.