Radio telescopes have long scanned quiet patches of sky for a lone, artificial-sounding ping, but a growing body of research is pushing astronomers to look instead at the loudest neighborhoods in the ...

The Dyson sphere is a hypothetical artificial structure proposed by physicist Freeman Dyson in 1960, which would cover a star with a structure and directly harness its energy. However, no matter how ...

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 ...