All ya gotta do is invent a new computer model, apparently:
Despite the large number of planets that could harbor complex life, the Milky Way is so vast that planets with high BCI values are very far apart, according to the scientists. One of the closest and most promising extrasolar systems, called Gliese 581, has two planets with the apparent, possible capacity to host complex biospheres. The distance from Earth to Gliese 581 is about 20 light years.
“It seems highly unlikely that we are alone,” say the researchers. “We are likely so far away from life at our level of complexity that a meeting with such alien forms might be improbable for the foreseeable future.”
Not to be rude, but lots of lonely people on this planet would like a new computer model that improved their chances too. The only problem is …
For a brief look at how this type of nonsense came to pass for science, go to The Science Fictions series at your fingertips (cosmology).