Astronomers have sent a radio message to a planetary system just 12 light years away, in case there's anyone there. But "METI" (messaging extra-terrestrial intelligence) has always been controversial, as I report for New Scientist.
Astronomers have sent a radio message to a planetary system just 12 light years away, in case there's anyone there. But "METI" (messaging extra-terrestrial intelligence) has always been controversial, as I report for New Scientist.