In article , Don Pearce
wrote:

That's my take on the numbers too. The process reminds me a bit of the
nonsensical Drake equation.

Well, the *equation* is quite logical. The snag is to fill in sensible
values for the variables. :-)

There has been some progress with this in the last decade or so as we've
finally begun being able to detect and examine extra-Solar planets. Finding
'life' is a bit harder, though. 8-]

Jim

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