The "Great Filter
" is a hypothetical barrier to explain why civilisations are so unlikely to progress to the point of inter-stellar colonisation that we have not encountered any in 40 years of looking. Maybe humanity has already negotiated the filter - as some massive evolutionary improbability - or perhaps it lies in our future as an almost-certain threat to our existence? We should hold our breath as we look for evidence of life on Mars
posted by rongorongo
on May 12, 2008 -
Another thwack at answering Fermi's question.
Which is, after scribbling a fairly convincing equation on the blackboard, "If there's intelligent life out in the universe, where are they?" An interesting sidelight is the principal donors: Paul Allen and Nathan Myhrvold of Microsoft... Both of whom are known for unverifibly abstract big-picture thinking, but maybe it'll pay off this time...
posted by aurelian
on Aug 1, 2000 -