Alien Candidate

Astronomers involved in SETI have found an unexplained radio signal. This signal, now seen on three separate occasions, is an enigma. It could be generated by a previously unknown astronomical phenomenon. Or it could be something much more mundane, maybe an artefact of the telescope itself. But it also happens to be the best candidate yet for a contact by intelligent aliens. Astronomers, surprised that a blip generated so much hype, have moved swiftly to quell speculation they may have received a deep-space radio signal from ET