Sagan's team created the greatest puzzle of all time, which you can only solve if your species understands the basic nature ...

Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other solar systems, even if that was not their original intention. Five robotic ...

For decades, we've been looking to the skies for any sign of aliens – but it turns out we may have been missing attempts at contact. A new study has cast doubt on our radio signal detection methods, ...

Whenever I tell people I’ve discovered a new exoplanet, invariably the first question is: "Could we live there?" In some ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home planet.

There is no chance in hell our species will be able to reach another Earth-like planet in the Universe in the foreseeable future, so the only way we can get a sense of the habitability of such places ...

A study suggests that stellar plasma may distort alien signals, complicating SETI's search for extraterrestrial life by pushing signals below detection thresholds.

A leading astrobiologist argues that advanced aliens may well exist but are likely giving Earth a miss, thanks to vast distances, brutal energy costs and our own hostile atmosphere.