On the underground doctors unleashing the healing powers of hallucinogens.

How a supposedly safe party drug turned lethal.

A clinical test is underway to evaluate MDMA—ecstasy—as a treatment for PTSD.

How a musical subculture evolved alongside a technological subculture:

Rave's rise mirrors the Web's in many ways. Both mixed rhetorical utopianism with insider snobbery. Both were future-forward "free spaces" with special appeal to geeks and wonks.