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The Drake equation is:
N = R_[ast] cdot f_p cdot n_e cdot f_[ell] cdot f_i cdot f_c cdot L
where:
N = the number of civilizations in our galaxy with which radio-communication might be possible (i.e. which are on our current past light cone);
originally posted by: VoidHawk
originally posted by: LogicalRazor
It is still probable that WE are the only civilization that has advanced technologically.
Why?
Being as WE know practically nothing about whats out there I find that hard to believe.
originally posted by: PleiaDsClusterDck
Logically N has to be greater than or equal to 1.
N = the number of civilizations in our galaxy with which radio-communication might be possible
originally posted by: Jonjonj
Oh, and just a thought, the whole idea of von Neumann like probes surely indicates the interest of an alien species to at least discover, and maybe conquer, other worlds. I'm not sure that all possible alien civilisations may have these goals as their primary objectives. So, perhaps be careful with those we may encounter...as their motives seem to be clearer
originally posted by: bottleslingguy
who cares what they calculated?
I don't get why people need to have some egghead's "official" blessing that ET is this or ET is that, or Et has probably already sent out probes blah blah blah.
it's pathetic.
let's just get on with the next move here.
come on people grow the f up.
originally posted by: bottleslingguy
who cares what they calculated? I don't get why people need to have some egghead's "official" blessing that ET is this or ET is that, or Et has probably already sent out probes blah blah blah. it's pathetic. let's just get on with the next move here. come on people grow the f up. a reply to: Totemic
originally posted by: PleiaDsClusterDck
In 4.5 Billion years of Earth's existence man has only existed in the last 2 million years or so. So during 99.95% of Earth's existence a probe would have found no intelligent life here.
originally posted by: Ectoplasm8
originally posted by: bottleslingguy
who cares what they calculated? I don't get why people need to have some egghead's "official" blessing that ET is this or ET is that, or Et has probably already sent out probes blah blah blah. it's pathetic. let's just get on with the next move here. come on people grow the f up. a reply to: Totemic
Having zero absolute evidence of alien visitation after many decades, many thousands of sightings, stories, abductions and on- there needs to be justification in the eyes of believers. That's why UFO cover ups and conspiracies are created to rationalize why we have no physical evidence for this physical event. They attempt to use science or mathematics to show *YES! They probably are here.* Yet, a majority of the scientific community and scientifically minded people say... No, they aren't here. We need evidence.
They're either here or they aren't. There's no kinda - sorta - maybe 'grey' area. The lack of concrete evidence in the span of decades and many thousands of claims shows they aren't here.
originally posted by: amazing
Not necessarily. It only takes one of those millions of sightings or reports to be real.
Taken a step further. It's quite possible that all sightings and reports are false and that these civilizations that are millions of years more evolved and advanced than us can send probes that can spy on us, so to speak, that we cannot detect yet with our puny, stone aged technology. This thread was only talking about the mathematical probabilities and they are quite high.
UNIDENTIFIED FLYING OBJECTS | EXTRATERRESTRIALS | MAJESTIC TWELVE = (267) + (232) + (167) = 666!