A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

As much as Steven Spielberg likes aliens, he seems to prefer holding them at arm’s length. The creatures in Close Encounters ...

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously ...

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the Sun.

SpaceX will call its planned AI megaconstellation "Starmind," continuing the company's stellar naming theme.

Some sci-fi films swing big and miss even bigger, leaving behind production troubles, unhappy audiences, and legendary cautionary tales. This list looks at titles that struggled with execution, ...

Movies love big ideas and bigger visuals, which often means science gets bent out of shape to keep the story moving. Some of these films play fast and loose with physics, biology, or geology in ways ...