A German UFO buff is suggesting that NASA's Voyager 2 spacecraft may have been hijacked by aliens.
The unmanned probe has for the last month been sending distorted signals back from its position near the edge of the solar system.
But it all makes perfect sense to Hartwig Hausdorf.
"It seems almost as if someone had reprogrammed or hijacked the probe - thus perhaps we do not yet know the whole truth," he told Bild.
NASA's rather more prosaic, describing the strange messages as a data transmission fault, probably caused by memory problems in the 33-year-old probe.
While it tries to work out what's going on, NASA has instructed the spacecraft to only send data on its own status, but says the problem can probably be fixed with a simple software patch.
If the messages do come from aliens trying to contact us, they must be rather dim ones. Voyager 2 carries a disk containing greetings in 55 human languages - none of them anything like the messages NASA is now receiving.
Voyager 2 and its sister spacecraft Voyager 1 are the most distant human-made objects - Voyager 2 has flown past Jupiter, Saturn, Uranus and Neptune. It's currently 8.6 billion miles away and still going.