RE: How did life start? No creationists please
June 18, 2013 at 2:51 pm
(This post was last modified: June 18, 2013 at 3:52 pm by Anomalocaris.)
(June 18, 2013 at 2:50 am)max-greece Wrote: even if multi-cellular life is actually a billion years old that still leaves a 3.2 billion year gap if life started even further back.
One favorite hypothesis is complex multi-cellular life, from the point of view of energy budget, is not favored unless it can exist in an ecosystem where the food chain is enriched in energy made possible by oxygen respiration. Oxygen respiration can't happen unless there is free oxygen in the atmosphere. Free oxygen can not easily exist in earth's atmosphere because oxygen is highly reactive and chemical reaction with rocks would rapidly scrub any oxygen that is in the atmosphere, unless something is continuously replenishing the atmosphere with free oxygen.
The only agent that continuously and copiously replenishes the atmosphere with free oxygen is cyanobacteria. Cyanobacteria evolved 2.6 billion years ago, and reached the abundance to turn the earth's atmosphere from chemically reducing to chemically oxidizing 2.4 billion years ago.
Initial steps towards multicellularity can happen before 2.4 billion years ago, but since multiceullarity didn't pay from energy budget perspective in a reducing atmosphere, the complete evolution to full blown multi-cellularity didn't happen so long as atmosphere remained reduing.
Only after the great oxygenation event 2.4 billion years ago was the condition favorable towards complete evolution of full blown multi-cellularity.
It is true that the earliest totally unequivacal evidence of multicellularity dates to 1.4 billion years later, during the late neoprotozoic era 1 billion - 540 million years ago. But it is tentalizing that the first hint of multicellularity dates to 2.1 billion years ago, just 300 million years after it is thought that conditions on earth first made multicellularity a profitable mode of existence.
(June 18, 2013 at 3:00 am)max-greece Wrote:(June 18, 2013 at 2:44 am)JesusIsAlive Wrote: Land Animals and. MAN. God made man in His own image. God saw everything that He had made, and it was very good. But soon the picture darkened. God must have known before hand that it would, and some have regarded his whole work of the creation of man as but a step toward the glorious world that will yet issue from it, as toldvin the closing chapter of Revelation. Read your Bibles. It is essential that you do.
So God has 98% commonality of DNA with Chimpanzees and Bonobos - interesting theory.
This means omnipotence and omniscience, far from being some overarching cosmological quality, is in fact an mundane artifact of just that 2% of DNA that makes christ different from chimp.
I always knew there was very little to omnipotence and omnicience.
