“Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.”

About Carl Sagan

Scientist • American

Carl Edward Sagan was an American astronomer, cosmologist, and astrophysicist who was a pioneer in the search for extraterrestrial intelligence. He is best known for his work in popularizing science, particularly...