Bicycle Day, celebrated annually on April 19, commemorates the world’s first recorded LSD trip, in 1943. That’s when Swiss chemist Albert Hofmann ingested lysergic acid diethylamide before bicycling ...

Add Yahoo as a preferred source to see more of our stories on Google. Bettmann via Getty Images In November 1956, three people gathered in a converted Connecticut barn to take LSD, a powerful ...

A single dose of LSD can affect the learning of motor sequences even hours after the psychedelic trip. This is shown by a study from the University of Freiburg.

The “bad trip” is one of the most common caveats against psychedelics. Sometimes it’s mentioned as a well-intentioned warning for first-timers and a reminder for seasoned users, while others use it as ...

BIRMINGHAM, England — Half a century after Timothy Leary urged the world to “Turn on, tune in, drop out,” there’s a surge of interest in lysergic acid diethylamide, or LSD. The psychedelic drug was ...