Nasa has said there are 'billions' of planets in our own Milky Way galaxy - but a new study suggests that the idea that they are teeming with alien lifeforms may just be wishful thinking.
Two Princeton scientists used what's known as 'Bayesian analysis' - a technque that 'boils down' ideas to the actual data, as opposed to scientists' own ideas about what 'should' be true.
They suggest that it's very possible Earth is a one-off aberration where life took hold unusually fast - and on the average extraterrestrial planet, the chances of life are very low indeed.
The potentially major, glaring flaw in this Bayesian analysis is the preponderance of evidence of ET visitation on Earth. If even one of the UFOs spotted in Earth's skies is physically real advanced technology not originating on Earth, then their entire argument goes up in smoke. To read more, click here.