Are we alone in the universe? Scientists haven’t found aliens yet, but by scanning the sky they’ve shown that our galaxy harbors billions of planets, many of which likely have conditions similar to those on Earth. Which brings new questions into sharp relief: When searching for life beyond our home planet, how do we know what to look for? What human prejudices might cause us to overlook intelligent life forms very different from what we expect? Learn how scientists across disciplines—astronomers, chemists and microbiologists—are intensely studying the evolution of life on Earth to help identify life abroad, a research agenda with wide-reaching ramifications for science, philosophy, religion, and much more.
This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.