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Carl Edward Sagan (/ ˈ s eɪ ɡ ən /; SAY-gən; November 9, 1934 – December 20, 1996) was an American astronomer, planetary scientist and science communicator.His best known scientific contribution is his research on the possibility of extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by exposure to light.
Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium is a 1997 book by the American astronomer and science popularizer Carl Sagan. The last book written by Sagan before his death in 1996, [1] it was published by Random House.
Carl Sagan, seen here with a model of Viking lander, popularized the aphorism. "Extraordinary claims require extraordinary evidence" (sometimes shortened to ECREE), [1] also known as the Sagan standard, is an aphorism popularized by science communicator Carl Sagan. He used the phrase in his 1979 book Broca's Brain and the 1980 television ...
Astronomer and author Carl Sagan criticizes President Ronald Reagan’s “Star Wars” defense program for outer space as unworkable and too expensive and endorses Democrat Walter Mondale for ...
Contact is a 1985 hard science fiction novel by American scientist Carl Sagan. It deals with the theme of contact between humanity and a more technologically advanced extraterrestrial life form. It ranked No. 7 on Publishers Weekly's 1985 bestseller list.
The Dragons of Eden: Speculations on the Evolution of Human Intelligence is a 1977 book by Carl Sagan, in which the author combines the fields of anthropology, evolutionary biology, psychology, and computer science to give a perspective on how human intelligence may have evolved.
Cosmos is a popular science book written by astronomer and Pulitzer Prize-winning author Carl Sagan. It was published in 1980 as a companion piece to the PBS mini-series Cosmos: A Personal Voyage with which it was co-developed and intended to complement. Each of the book's 13 illustrated chapters corresponds to one of the 13 episodes of the ...
Carl Sagan, in his work The Demon-Haunted World: Science as a Candle in the Dark said: "There are naïve questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand the world.