So you believe animals on earth evolved from microbes, but for microbes (on earth) you believe in creation?
Microbes themselves would have evolved from simpler self-replicating entities.
Amyloid proteins for example can self-replicate, and it has been suggested such proteins were the very first steps in the origin of life, before RNA and DNA genetics appeared. In lab simulations of early Earth conditions, amino acids, peptides and these amyloid proteins are readily formed.
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One thing crucial to understand when contemplating the origin and evolution of life is the need for a good source of
negative entropy (negentropy),
which is an ordering force that allows you to create life out of inanimate matter.
Earth is abundantly supplied with negentropy every day, and without this ordering force of negentropy, no life could ever have evolved.
This is because the 2nd law of thermodynamics tells us that in any isolated system,
order can never increase; order can only progress to disorder. In other words, in general, chaos rules in the universe, as everything is destined to fall apart and become more disordered over time.
But life itself contradicts this 2nd law, because living creatures are highly ordered and highly structured assemblies of elements. When life appears in a environment where there was no life before, that is a spontaneous ordering of the disordered chemical elements in that environment into a highly ordered living being.
Even a new baby growing in a womb involves a process of exquisite ordering of chemical elements — elements obtained from the food the mother eats. The mother turns the disordered elements in the food into a highly ordered new living being!
All life processes go against the 2nd law, because the essence of life is order created out of disorder. But because life is based on such ongoing ordering processes, life requires a constant supply of negentropy to function. Without negentropy, there could be no life.
If you put all the appropriate chemical ingredients for life in an isolated flask at the right temperature, it would be impossible for life to appear or evolve, because the 2nd law of thermodynamics tells us that in such an isolated system, you cannot get more order than you started with; the level of order can only remain the same, or progress to further disorder.
But the Earth is not an isolated system, as it has a constant negentropy input. And this constant supply of negentropy is what makes life possible.
The reason Earth is bathed in negentropy relates to the high frequency visible light we receive from the Sun each day, and the low frequency infrared invisible light the Earth radiates back into space.
The energy we receive from the Sun daily is balanced by the energy the Earth radiates back into deep space as infrared (if this energy input and output on Earth were not in balance, the Earth would heat up to thousands of degrees centigrade by the energy from the Sun). So Earth does not actually receive any net energy from the Sun; all the energy received from the Sun is radiated back into space as infrared light.
But here's the thing: high frequency visible light is in a state of low entropy (thus has more order), and low frequency infrared light is in a state of high entropy (which has less order). So from the entropy perspective, the entropy accounts on Earth are unbalanced: the Earth receives much more negentropy from the Sun than it radiates back into space.
The net result is that Earth is bathed in a constant supply of negentropy, which is an ordering force that can be used by living creatures to create order out of disorder.
The constant supply of negentropy not only drives evolution, and the daily routine metabolic processes in our bodies and in all life on Earth, but also drives the creation of ever more ordered societies. Whether we like it or not, we are forced in the direction of increasing order.
When I first read about this fact that Earth is bathed in a negentropy ordering principle (I actually read it in a book by Gary Snyder), I was totally amazed, because it seems so philosophically profound.
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