It starts with a signal. Faint, strange, and unlike anything humanity has ever recorded. Within hours, it escalates into an event that changes the course of history as an alien arrival on Earth ...

How Radio Astronomy Helps Us See the Invisible Cosmos," astrophysicist Emma Chapman describes the hidden corners of space ...

A recent theory proposed by a NASA scientist suggests that extraterrestrial civilizations may not possess the wildly advanced technology that many UFO enthusiasts expect. This perspective, which ...

Every November, the Leonid meteor shower lights up the sky — a dazzling reminder that our planet is just one small part of a vast, mysterious cosmos. As shooting stars streak overhead, it’s hard not ...

Science fiction has long speculated about the possibility of first contact with an alien species from a distant world and how we might be able to communicate with them. But what if we simply don’t ...

Scientists setting up ‘post-detection hub’ in Scotland are concerned humans would react ‘like headless chickens’ The moment has been imagined a thousand times. As astronomers comb the cosmos with ...

Movies, such as Close Encounters of the Third Kind, and conspiracy theorists insist we are not alone. Everett Collection As far as we know, we are alone in the universe. Earth is the only planet known ...