NASA has quietly hit pause on what it billed as its first dedicated hunt for alien biosignatures, reacting to fresh data that ...

The United States is stepping back from the most direct test yet of possible alien biology on Mars just as new telescopes and ...

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

If nonliving materials can produce rich, organized mixtures of organic molecules, then the traditional signs we use to ...

Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the asteroid belt between Mars and Jupiter, harbored the right conditions to ...

Discovering extraterrestrial life has tantalized the public imagination as far back as Epicurean philosophers in Ancient Greece. Yet despite centuries of speculation, the search for alien lifeforms ...

• Simulate planetary conditions more precisely Future Missions: Europa Clipper, Dragonfly, and Mars Life Explorer will carry tools to detect isotopes and chirality, helping verify whether signs of ...