If the universe is so vast and filled with billions of potentially habitable planets, why haven't we encountered any signs of ...

Could ancient civilizations have encountered extraterrestrial beings? This question has intrigued humanity for generations.

Cosmic rays traveling through space may provide enough energy to sustain life even in incredibly cold and dark environments, ...

Mars, Europa and Enceladus are the three most promising locations in the solar system to search for life living off cosmic rays.