The Eerie Silence: Renewing Our Search for Alien Intelligence

One of the world’s leading scientists explains why—and how—the search for intelligent life beyond Earth should be expanded.

Fifty years ago, a young astronomer named Frank Drake first pointed a radio telescope at nearby stars in the hope of picking up a signal from an alien civilization. Thus began one of the boldest scientific projects in history, the Search for Extraterrestrial Intelligence (SETI). After a half-century of scanning the skies, however, astronomers have li…