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.

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, ...

Anytime anything even remotely unusual happens in space, you can bet that there will be people who say that it must be aliens. Usually, these are regular people who happen to enjoy alien conspiracies, ...