Carl Sagan was born in 1934 in Brooklyn, New York. He was brought up in a liberal Jewish home where his parents were moderately religious, his mother more so than his father. This upbringing inspired Carl's lifelong interest in the dichotomy of religion and science. Although many atheists consider Sagan an atheist he preferred to call himself an agnostic. Sagan was active in the skeptic community appeared on the cover of Skeptic Magazine and Skeptical Inquirer many times. Carl Sagan's love for science started early in his life, around kindergarten, when he began to inquire about space and the galaxy. The size and age of the universe impressed him, even at this early age, and from then on, he was hooked. He had to know more. Sagan started visiting New York City museums, planetariums, and libraries in his never-ending quest for knowledge. Carl Sagan was a brilliant and devoted student. He graduated from the University of Chicago with a bachelor of arts in 1954. Shortly after, he received a bachelor of science and two years later his masters. Sagan immediately began work on his doctorate and graduated with honors in 1960. After receiving his degrees, he taught at Harvard before settling into Cornell and became heavily involved with planetary research there. He was also a very formative part of the space program at NASA, even before he graduated with his bachelors' degrees. It was Sagan's idea to leave universally understood messages in space for potential alien beings to find and decode. Sagan was very helpful in researching the planets Venus and Saturn and cleared up many long sought after questions about Venus' surface environment and Saturn's many moons. Through his research about Venus, Carl Sagan also hypothesized about global warming on earth, one of the first scientists to do so. Carl Sagan enjoyed research about planets, but his main passion was the study and search for alien life forms in space. This is undoubtedly what led him to research the environments of planets like Venus and Mars. Carl Sagan wrote many books, articles, lectures, and is behind one of the most successful and viewed PBS programs of all time, Cosmos, which won many awards including an Emmy. One of his books, Contact, was later made into a feature length film directed by Robert Zemeckis and starring Matthew McConaughey. Another way in which Sagan has been immortalized is through the naming of a unit of measurement after him. The Sagan refers to a measurement that is at least equal to four billion. Learn more about agnostic definition, non believers, and famous atheists at my websites.