Among psychedelic enthusiasts, April 19 or Bicycle Day honors a mind-altering ride taken by the Swiss chemist who created LSD.

Diplo says he ran a marathon while on LSD. You're not alone in wondering if that's a good idea. Here's what medical experts say about psychedelic use.

With LSD finally gaining mainstream acceptance — just last month, the FDA granted breakthrough status to an LSD formula to treat anxiety — author Norman Ohler investigates how it took so long ...