If humanity ever makes contact with an intelligent extraterrestrial civilization, we will have no shortage of questions.

The universe is vast, ancient, and mostly silent. For decades, scientists have pointed their telescopes toward distant stars, searching for signs of intelligent life. We scan the cosmos for radio ...

Scientists have issued a new blueprint for the day Earth receives a message from an alien civilization. Released Friday, the eight-point plan lays out how researchers should handle a potentially world ...

Searching for extraterrestrial intelligence has so far primarily meant focusing on one particular type of signal—and that signal has normally been based on our own current cutting-edge technology. But ...