Are humans alone in the universe, or could intelligent alien civilizations exist somewhere beyond Earth? For more than 60 ...

Scientists are confronting a mystery that has remained unanswered for more than 75 years: why has no evidence of an advanced ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system. New research suggests that radio emissions from intelligent aliens may be ...

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 ...