Carl Sagan and His Best Bud Get Blazed and Save the Universe

In 1967, Harvard Medical School professor Dr. Lester Grinspoon set out to research marijuana sufficiently to convince his best friend—famed astronomer Carl Sagan—to stop smoking weed all the time. But after making a fateful trip to the library, Grinspoon returned convinced the case against Mary Jane was all lies and propaganda. So Lester and Carl began enthusiastically exploring the cannabis "Cosmos" together, igniting the medical cannabis movement and sparking many stoned epiphanies along the way. PATREON Please support Great Moments in Weed HIstory on Patreon. Supporters get exclusive access to video shows and seshes, plus access to cool rewards like a signed book or signature lighter. And it truly helps us make the best show possible.