Buffalo, I wanted to comment on this other interesting point you made, about humanity being at the central point between large and small.
At the evolution conference at which I spoke in Hawaii (3-9 January), cosmologist Joel Primack and his wife Nancy Abrams gave an astonishing talk (available on CD-ROM at
viewfromthecenter.com/) called “The View from the Center of the Universe.” They discuss the very point you mentioned, which some see as one of the more remarkable of the anthropic coincidences – namely, that the human person occupies a point importantly situated between the infinitesimal and the incomprehensibly large, between quarks and superclusters of galaxies.
While rejecting an anti-scientific Intelligent Design position, I think it is possible – indeed, for a theist necessary – to note the possibilities and necessities built into the universe from the start (Jack Haught writes of this as “theology of promise”). A biological entity with a brain capacity much smaller than ours (say, a mouse) would not have sufficient neurons to permit complex reasoning or self-conscious, or reflexive thought that could give rise to moral and religious consciousness. A being far larger that us – say the size of a planet, or a molecular cloud – would have a “brain” too large to permit instantaneous transmission of electrical impulses, so it is hard to imagine how it could be “conscious” in the sense that we understand that word.
If I go on longer I’ll soon be well out of my scientific depth, but in any case I, find the Primack discussion lucid and a valuable starting point for doing “exo-theology.” It may well be that wherever and however conscious, rational, and religiously responsive life evolves in the universe, it is constrained to follow certain parameters. It’s body cannot be too large or too small, and it cannot evolve on planets with too much or too little gravitational attraction. It may even be that for brains to think spiritually the body’s physiology has to be endothermic, ruling out a reptilian or amphibian platform. It may be that altruism, compassion, and spiritual vision had to await the evolution of the higher mammalian brain. I’ll leave these matters for Hecd and other biologists and neuroscientists to discuss.
Petrus