Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

Known as one of the more outspoken UFO whistleblowers, Luis Elizondo took an interesting turn this week, claiming that ...

Something on Pluto and one of Saturn’s moons, Titan, absorbs light in a way unexplained by anything in spectroscopic ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

For many people, the Milky Way is something they have seen only in photographs. Under most urban skies, the galaxy's faint ...

Investigating an area of interesting light rock seen from orbit, Curiosity found some particularly weird-looking structures.

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

A Chinese spacecraft on a mission to collect and return samples of a near-Earth asteroid beamed back its first image of its ...

A new Mars Rover image captured by NASA's Curiosity mission has reignited debate over whether unusual formations on the Red ...

NASA has received one of the most unusual-looking pieces of hardware ever associated with the Artemis III program, and ...