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**movlabc** · 08-31-2012, 05:19 PM

Again, we certainly aren't going to get definitive answers. But it seems to me that at this step we can still do some relatively rigorous modelling
eg if complex life needs liquid water and a surface tectonically active for >2By then F should be something like...
if complex life needs a large moon, liquid water and a surface tectonically active for >3By then F should be something like...

I'd agree we could put some sensible limits on the upper range.

I'm not sure we can do much at the lower end, until we understand the evolutionary processes better.

08-31-2012, 05:19 PM	#20
movlabc Join Date Oct 2005 Posts 431 Senior Member	Again, we certainly aren't going to get definitive answers. But it seems to me that at this step we can still do some relatively rigorous modelling eg if complex life needs liquid water and a surface tectonically active for >2By then F should be something like... if complex life needs a large moon, liquid water and a surface tectonically active for >3By then F should be something like... I'd agree we could put some sensible limits on the upper range. I'm not sure we can do much at the lower end, until we understand the evolutionary processes better.
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