Carl Sagan had a bone-chilling prediction about America in 1995. A passage from his book, The Demon-Haunted World, is now trending online a day after Donald Trump’s presidential inauguration. TikTok ...

Dr. Sagan, a planetary scientist who was recognized for both his ingenious scientific ideas as well as his enormous influence in popularizing space science, was a new member of the SETI Institute’s ...

Dr. Lance B. Eliot is a world-renowned AI scientist ... made in 1975 by famed astrophysicist and science communicator Carl Sagan that AI would eventually and inevitably become a psychotherapist ...

This story appears in the August 2017 issue of National Geographic magazine. Carl Sagan spent his childhood immersed in Mars. The future scientist, an avid reader of Edgar Rice Burroughs’s ...

Over the last century, our understanding of the evolution of stars has improved dramatically. By studying the cosmos, we have gained a pretty good theoretical model of how stars change over their ...

The famed astrophysicist Carl Sagan and former President Jimmy Carter shared a fundamental understanding about the fragility of our planet and the futility of our wars in a "vast and awesome universe.

Dr. Carl Sagan once stated that the absence of evidence does not mean that evidence is absent. Thought processes like this ...