Humanity has already sent five spacecraft on trajectories that will eventually carry them beyond the Solar System, ...

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

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 interstellar body ...

Alien probes could already be hiding somewhere in our Solar System – and our current surveys are nowhere near good enough to ...

Our search for technosignatures—clear signs of advanced civilizations beyond Earth—takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological ...

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

In September, NASA announced the discovery of a possible sign of life, known as a potential biosignature, on Mars. The Perseverance rover, which has been exploring a dried-up lakebed for years, found ...

There may be 19 asteroids in orbit around the sun that come from somewhere else entirely. If true, we could visit an alien 'world' without ever leaving the confines of the solar system. Share on ...