This video breaks down why K2-18b has suddenly become one of the most important planets in the search for life beyond Earth.

SETI scientists searched the interstellar object 3I/ATLAS for radio signals that could indicate extraterrestrial technology ...

Researchers have looked at how particular microbes from Earth would fare in conditions like those of Mars, the moon, and the ...

While NASA burns billions chasing little green men, the most alien life on record is already swimming beneath Earth's waves — ...

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth.

New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

In the book version of “Project Hail Mary,” author Andy Weir, known for grounding his fiction in plausible science, describes ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

The recent discovery of an enigmatic substance on the surfaces of both Titan, Saturn’s largest moon, and Pluto, our solar ...

Astronomers say interstellar comet 3I/ATLAS may be up to 12 billion years old, making it far older than the Solar System. New ...