Carl Sagan was an avid user of ...
Carl Sagan was an avid user of marijuana, although he never admitted this publicly during his life. Under the pseudonym "Mr. X", he wrote an essay concerning cannabis smoking in the 1971 book Marihuana Reconsidered, whose editor was Lester Grinspoon. In his essay, Sagan commented that marijuana encouraged some of his works and enhanced experiences. After Sagan's death, Grinspoon disclosed this to Sagan's biographer, Keay Davidson. When the biography, entitled Carl Sagan: A Life, was published in 1999, the marijuana exposure stirred some media attention.