If life exists beyond Earth, water may be the first clue. Water Worlds explores the planets and moons where liquid water could exist — and where alien life might be quietly thriving.

Following speculation that comets could have been alien spacecrafts, more and more experts in the field are convinced that ...

In the South China Sea, near the Paracel Islands, the aqua-colored waters of an expansive shallow reef platform suddenly ...

"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most ...

If you found out we weren't alone... would that frighten you?' Spielberg's 'Disclosure Day' is one of 2026's most anticipated ...

Pluribus imagines Kepler-22b as an ocean world that sends a gift to humanity through radio waves. In real life, no such ...

Decades ago, a spacecraft suggested Saturn's largest moon, Titan, had an ocean. New observations suggest that the liquid may look more like slush.

If aliens are out there, why haven’t we heard from them? That’s the question at the center of Pop Mech’s new story, “Aliens Probably Exist—But They’re Staying Silent For a Reason, NASA Scientist ...

Hidden within Cassiopeia A, the youngest known exploded star in our galaxy, astronomers have found surprisingly high levels of chlorine and potassium. These elements carry an odd number of protons in ...

The moon once dismissed as the solar system’s most hostile environment may now sit directly in the path of an object that defies conventional explanation. Two decades of scientific certainty just ...

Unidentified Anomalous Phenomena (UAP), formerly known as UFOs, have been visiting earth for decades and the U.S. government knows about it. At least that’s the case made in the recently released ...