A prominent American astronomer, astrophysicist, author, and avid science popularizer, Carl Sagan was born in 1934 in New York City and lived his childhood being in a very close relationship with his parents, who were sure that their son is a future genius and did everything possible to provide his with proper education and support. Carl received his scientific degrees and started his scientific career at the University of Chicago. Since his childhood, he was interested in the cosmos, cosmic life, and extraterrestrial activities. The extent of the scientific activities of Sagan was really wide, starting from doing some chemical experiments on exploring the amino acid activities, and ending up with composing messages sent to space by modern technology like Voyager, etc. The scientist is considered to be the pioneer of exobiology. Sagan was combining his scientific research with his hard work on making science more available and popular among modern people. He wrote a number of books and over 600 scientific articles, created and took part in plenty of TV and radio shows. His scientific book Contact was taken as a base for the same name movie, which received a very warm reaction of critics and the general public. Carl Sagan was an extraordinary personality and a very intelligent man, he was interested in many aspects of social and scientific life, was a philanthropist and activist. He was married three times and had 5 children. He died of pneumonia at the age of 62.