"Robert J. Bradbury" wrote:
>
> Interesting article at spacedaily:
> The Moon and Plate Tectonics: Why We Are Alone
> http://www.spacedaily.com/news/life-01x1.html
>
> It discusses the fact that the glancing collision
> that produced the moon, in removing a significant
> fraction of the mantle & crust, may have served to enable
> plate tectonics which in turn enables the CO2 recycling
> that provides a stable environment for life to evolve.
>
> If accurate, this tends to increase the number of
> water worlds and decreases the locations where life
> may evolve.
Very interesting, and corroborating my earlier statements about large
moons being necessary for intelligent civilizations.
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