Is the rest of the cosmos a pristine environment awaiting the arrival of humanity’s “post-human” descendants? Or is advanced ...

Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new ...

Life may not get blasted off any of the known "super-Earth" worlds as readily as it can from our planet, scientists find. The discovery suggests that any intelligent aliens that develop on such ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.