Add Yahoo as a preferred source to see more of our stories on Google. Mundane wayward space snowball, or extraterrestrial visitor? Astronomers believe that our solar system's latest and only third ...

There’s no denying the allure of alien artifacts. Science fiction is awash in the material remnants of extraterrestrial civilizations, which surface in everything from the classic books of Arthur C.

Scientists are sharpening the methods used to search for alien artifacts inside our own solar system, drawing on recent peer-reviewed studies published in The Publications of the Astronomy Society of ...

A mysterious object spotted hurtling toward Earth has sparked a wave of global panic and wild alien invasion theories online. Astronomers have confirmed the discovery of a new interstellar object ...