Are we alone in the universe? So far, definitive proof has eluded us. However, in recent years scientists have been engaged in a widespread search for extraterrestrial life, which has produced encouraging results.

To learn the latest about the quest for life beyond Earth, Dave DeAngelis interviews Washington Post science writer Marc Kaufman. Marc is the author of First Contact,” where he describes compelling new evidence that suggests life beyond Earth is not only possible, but highly probable.