Re: Relevant - Plate Tectonics Might Only Occur on 0.003% of Planets. That Makes Earth Very Special Indeed.

On Fri, 5 Jul 2024 14:01:44 -0700, a425couple <a425couple@hotmail.com>
wrote:

On 7/5/24 06:22, John Savard wrote:

I remember back in the day it being claimed that Earth's very unique
giant Moon may have been essential for the development of life on
Earth along the lines it took.
 
So this claim about plate tectonics reminds me of that.
 

>
OK
Rare Earth: Why Complex Life is Uncommon in the Universe
Paperback – December 10, 2003
by Peter D. Ward (Author), Donald Brownlee
>
both the book, and the wiki, you can see more at
https://www.amazon.com/Rare-Earth-Complex-Uncommon-Universe/dp/0387952896
and
https://en.wikipedia.org/wiki/Rare_Earth:_Why_Complex_Life_Is_Uncommon_in_the_Universe
>
is a very informative and important book on the subject.
Yes, the Moon, and plate tectonics are very important,
as are a big complex of other factors like Jupiter,
Goldilocks Zone, the right kind of star, etc.
>

But I don't see this as bad news, if it were true.

>
OK.
I am not sure that your "superior aliens" are necessarily
bad, but yeah, they might not be good for us.
>
You might look up earlier mentioned book "Saturn Run".

Ah, yes. Rare Earth brings in another factor: there may be a habitable
zone in galazies, with those systems further out not having enough
asteroids to shake things up and speed up evolution, and those in the
center of the galaxy being so metal rich as to have constant asteroid
impacts.

And I agree with Arthur C. Clarke, that advanced aliens are more
likely to be benificent. However, in a crowded Universe, there would
be so many races that some might be exceptions to that rule.

John Savard