posted on Feb, 24 2012 @ 10:07 AM
Natural Selection or Evolution may begin even before Life starts. While investigating the primordial soup on earth before life began, it seems
non-living molecules where already "evolving".
When simple molecules combined to form more complex molecules, they sometimes gained an advantage and tended to hang around longer.
One example is the compound of glutamic acid and two glycine molecules. Individually, each of these molecules was easily destroyed by ultraviolet
radiation. But put together, they were extremely stable.
Since the more complex molecules could resist destruction by natural forces in their environment, they could go on to form even more complex
molecules. These were the building blocks of Life.
The big breakthrough came when molecules started to replicate or make copies of themselves, like RNA or DNA. This, combined with metabolic processes,
is what most biologists would call Life.
This idea assumes that for Life to start, one only needs the right amounts of liquid water, organic molecules and energy. This is not a new idea, but
it seems to be getting support.
This notion does not involve the idea of God or Panspermia (life brought here on asteroids and comets).
To avoid a religious debate, I would just like to add that "God" may be working behind the scenes anyway and the image of a God pointing a finger to
start life may be simplistic.