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Not just the goldilocks zone.
Why has only one 'effective' intelligent species evolved on Earth?
I was a big believer in life elsewhere, until a speaker at one NACAA conference made the point the Madagascar and NZ had been isolated long enough, with all the right conditions, for either lemurs or parrots to develop as 'intelligent beings'- much longer than it took us to come about...
I can't come up with reasonable/reasoned arguments against that, which has emptied out my universe considerably.
Sure, intelligent life most likely exists elsewhere, but no fun at all if it's 3 galaxies away and off to the right!
Neville
LSO
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