The answer is much more simple. Let us assume that every 1000 solar systems has one system with intelligent life on it.
#1 given normal known methods of space travel, it would take generations to reach the nearest planet possibly containing life.
#2 given time, there is a VERY small possibility that when we arrive at that planet it has intelligent life. Intelligent life may have died out, or it may be currently evolving. Or by the time we reach it they may have up-and-left.
#3 The chances of crashing into another alien vessel in space is almost 0. Infinitely improbable. Therefore to actually meet another alien vessel, aliens must have traveled to the same planet at the same time as us. Given the vast distances this is highly unlikely.
#4 We don't have "lifesign" scanners like in star trek. Determining that a planet has advanced technology would mean going to the dark side and looking for lights. If the culture is not yet advanced enough, then we won't find enough of it to be visible from space.
#5 while talking about #4, atmospheric conditions may make it very difficult to see anything on the surface.
#6 given all above, what is the probability that a race of aliens got to earth (within the last 300 years)? Otherwise earth would look like a habitable planet, but no sign of advanced intelligent life. I'd say I have a higher chance of winning every lottery in the world on the same day.
#1 given normal known methods of space travel, it would take generations to reach the nearest planet possibly containing life.
#2 given time, there is a VERY small possibility that when we arrive at that planet it has intelligent life. Intelligent life may have died out, or it may be currently evolving. Or by the time we reach it they may have up-and-left.
#3 The chances of crashing into another alien vessel in space is almost 0. Infinitely improbable. Therefore to actually meet another alien vessel, aliens must have traveled to the same planet at the same time as us. Given the vast distances this is highly unlikely.
#4 We don't have "lifesign" scanners like in star trek. Determining that a planet has advanced technology would mean going to the dark side and looking for lights. If the culture is not yet advanced enough, then we won't find enough of it to be visible from space.
#5 while talking about #4, atmospheric conditions may make it very difficult to see anything on the surface.
#6 given all above, what is the probability that a race of aliens got to earth (within the last 300 years)? Otherwise earth would look like a habitable planet, but no sign of advanced intelligent life. I'd say I have a higher chance of winning every lottery in the world on the same day.