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.

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: dottedhippo via Getty Images An advanced alien civilization may want to cruise around the ...

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, ...

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 ...

Aliens they are not. That was what forensic experts in Peru said about two doll-like figures and an alleged three-fingered hand that customs authorities in the South American country seized last year ...