In October 1984, Popular Science wrote about one of the more promising chapters in the search for intelligent life. NASA was set to embark on a 15-year mission: An 85-foot-tall radio telescope would filter out the torrent of chaotic radio signals it received while it scanned the universe, "seeking the one unambiguous pattern that would signify something totally extraordinary," we wrote. Sadly, those efforts didn't yield much, and today NASA is focused on finding any life--intelligent or no. In the decade to come, the agency plans to send a spacecraft to Jupiter's moon Europa, which could possibly harbor life beneath its icy surface. To learn more, click here.