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 ...

Alien life may not need the kind of home humans instinctively search for. Some of the strangest possibilities begin once ...

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 ...

What if aliens were building a massive power plant?Last time, I talked about the "Kardashev scale," which classifies the ...