Quote:
Originally Posted by transreality
If the rate of abiogenesis is 1 in 1000 stars, then at our local neighbourhood density we could expect incidents of life to be separated by about 50 light years.
If 1/1000th of life occurrences develop intelligence and are communicating, then 1 should be about 1500 lyr away.
of course my maths is dodgy and many approximations etc, but from our local perspective life would not appear too plentiful.
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Almost exactly the assumptions we use in OA, as it happens. Absolutely no guarantee that we are right, of course.