On the evolution and probability theme . . . . . . consider that the earth has been around for hundreds of millions of years (or whatever) . . . humans have had the technology for sending signals into space (or receiving them) for the last 50 or so! Now even if we are all around for another million years before we die of disease our wipe ourselves out by war or we are hit by a meteor . . that 'million years' timeslot (during which we have capability to send and recieve) is relatively a blink of an eye in the great scheme of things.
Now assuming 1000 other planets evolved intelligent life at various random 'million year' timeslots in a similar way over the countless billions of years . . then it would actually be a miracle if 2 such evolved planets coincidentally co-existed in the same time frame . . . hence our sense of being all alone.
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Where your talents and the needs of the world cross . . there lies your vocation.
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