- NASA can't rule out 'potential unknown alien technology' in Earth's atmosphere
- But it says it prefers to call them UAPs - 'unidentified anomalous phenomena'
The study of flying saucers, UFOs and claims alien spaceships are visiting the earth has long been the preserve of mavericks and the unhinged.
But yesterday, NASA said it wanted to dispel the 'negative perception' surrounding Unidentified Flying Objects and make it a scientifically respectable field of study.
As part of the effort to put the study of UFOs onto a more scientific footing, it said it preferred to call them UAPs - 'unidentified anomalous phenomena'.