We hoped extraterrestrials could decode the plaque attached to the Pioneer spacecraft in the 1970s. Would we be able to figure out theirs? A recent paper claiming that a comet was the source of SETI’s ...

Imagine the day when we finally receive a signal from an extraterrestrial intelligence, only to find that there’s a message embedded within. Given that we don’t speak the same language, how could we ...

Do you speak alien? For years radio telescopes have been listening to the cosmos in the hope of picking up an alien message. We have had no luck yet, so while we wait René Heller organised a trial run ...