Origin Of Life
Many years ago, first formed by Aristotle, there was a belief in Europe that life could spring from non-living matter. Pasteur had proved this false by the 18th century. There are many theories on how life started on Earth. The current model is that in the primordial soup there were amino acids and prehistoric forms of RNA. The RNA began to form ribosomes. When the RNA finally came together with the ribosomes, a cell membrane was formed and eventually a cell would follow.
There are still many debates about this theory. Metabolism first theories suggest the idea of self-replication of a naked gene. The primitive metabolism could provide the environment in which RNA could later evolve. The bubble theory is another suggestion for life. Bubbles like the ones on the beach at night may have been concentrated on primitive shorelines. The bubbles would have a tendency to spontaneously form into lipids. When the bubbles busted in the right medium primitive multi-cellular organisms formed. In the clay theory, organic molecules gradually arose from a pre-existing, non-organic platform. It was truly "life from rock." Life was also thought to evolve about 5km below ground. Perhaps life evolved from other planets. Scientists believe that an asteroid from Mars came with organic compounds on it. Life could've come from anything; since no one was there to observe the creation of life, no one can truly tell what happened. For now, scientists will keep proposing theories until they can finally get it right.