DMT

N, N-Dimethyltryptamine (DMT) is known for catapulting users into a series of vivid, incapacitating hallucinations. But despite the kaleidoscope of variation on offer, the enduring mystery of DMT is the encounters it induces with 'entities' or 'aliens': "jewelled self-dribbling basketballs" or "machine elves", as the psychedelic missionary Terence McKenna described them.