The first unmistakable signal from another intelligence may not be a cheerful greeting. A growing group of researchers is ...

A new paper posits that advanced alien civilizations may communicate through subtle flashes, like fireflies do on Earth. The ...

Scientists have proposed that advanced alien civilizations could build a Dyson sphere around a black hole instead of a star.

Erich von Däniken, the Swiss author whose bestselling books about the extraterrestrial origins of ancient civilizations ...