There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer ...

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life.

An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...

Alien planets across the Milky Way reveal how strange, hostile, and spectacular other worlds can be, from the nearby promise of Proxima Centauri B to gas giants with glass storms, burning ice, metal ...

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

James Webb has revealed that the sunrise and sunset sides of WASP-121 b have surprisingly different atmospheres.

Disclosure Day had people talking for its fresh take on alien contact and powerful sci-fi themes. These films follow the same ...

As for those salt clouds, the salt is not table salt or even Pink Himalayan Rock Salt, though that would go splendidly with ...

If someone told you there’s a place in Wisconsin where the landscape looks like it was borrowed from another planet, you’d ...

Scientists can't fully agree on what GJ504b actually is. It may be a massive planet or a brown dwarf, a mysterious class of ...