Of course, ‘alien’ can mean many things and the depiction of aliens that we’ve seen in films like E.T and Ridley Scott’s Alien franchise probably won’t translate to our potential galaxy companions, ...

If so, why haven’t they said hello? The humble residents of this pale blue dot have been on a quest to find an alien civilisation for more than a century. First, it was the “canals” of Mars. Then ...

Radio telescopes have long scanned quiet patches of sky for a lone, artificial-sounding ping, but a growing body of research ...