Carl Sagan was an American astronomer, astrophysicist, and science communicator who was a prominent figure in popularizing science in the late 20th century.  Sagan's influence on humanity extends beyond science, as his advocacy for reason, skepticism, and the search for knowledge have inspired countless individuals to pursue a deeper understanding of the natural world. His legacy includes the promotion of scientific education and literacy, as well as the ongoing debates about the role of science in society. Sagan's ability to communicate complex scientific concepts in a clear and engaging manner has made him a beloved figure to many and his influence continues to inspire individuals around the world.