An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has ...

A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.

Instead of some far-off galaxy, a new paper suggests extraterrestrial life might come from underground. The piece, written by researchers from Harvard and Montana Technological University, suggests ...

To explore the galaxy and hunt for resources, intelligent aliens might need to turn their home stars into natural spaceships, a new paper suggests. A few known star systems might fit the bill. An ...

The newly discovered interstellar object 3I/ATLAS could be a piece of "possibly hostile" extraterrestrial technology in disguise, according to controversial research from a small group of scientists, ...

A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested. A ...