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Key Facts In This Video
On April 19, 1943, Albert Hofmann ingested 250 micrograms of LSD and took a bicycle ride home, resulting in the first intentional acid trip. 00:28
LSD affects serotonin receptors to cause hallucinations, but scientists aren't exactly sure how. 02:30
In the 1950s, the MKUltra program involved the military and the CIA secretly slipping LSD to various subjects. 04:57