Before I fulfill the intention of the title of this essay to
lay out the reason why billions of planets in our own galaxy amount to pittance
with respect to the question of other habitable planets, I wish to highlight
one further highly relevant concern. The
literature I read on these matters consistently understates the ramifications from
the distinction between so-called primitive (single-cell) life on the one hand,
and advanced life (homo sapiens) on the other in matters of habitability.
The former is by order of magnitudes more adaptable to “environment”
conditions of a kind that would be absolutely hostile, if not fatal, to the
survival of, say, human-like creatures.
Now, I will turn us to the extensive list of the actual environmental requirements that
are necessary for any planet to be considered as “friendly” to advanced life on
the order of human beings.
To be continued…
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