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On this day: April 16

Published On: Apr 15 2013 11:35:29 AM CDT   Updated On: Apr 16 2014 01:00:00 AM CDT

LSD's creator drops acid (accidentally) for the first time, Martin Luther King writes his "Letter from Birmingham Jail," The Rolling Stones release their debut album, and tragedy strikes Virginia Tech, all on this day.

OTD April 16 - Albert Hofmann
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Siggi Bucher/Reuters

1943: The hallucinogenic effect of the drug LSD, lysergic acid diethylamide, is first observed. Swiss chemist Albert Hofmann (seen here in 2006), who had synthesized the drug five years earlier in hopes of treating respiratory problems, accidentally absorbed some of the drug through his skin from touching its container. The drug affected his nervous system and he became dizzy with hallucinations. Three days later, he intentionally ingested 250 micrograms of LSD, becoming the first intentional acid trip.

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