(This post was originally posted at Disjointed Thinking.)
When someone states that they do not believe in God, often one of the first questions in response is, “Then how did life get here?” Of course, “God did it” is not a good explanation for, well, much of anything, because it does not actually provide any details about the process it claims to explain.1 Regardless of this, however, it is still a valid question to ask: Without invoking a God, is there a reasonable explanation for how life arose from non-life? This is where the field of abiogenesis comes in.
My goal with this article is to provide a general overview, in simple terms, of the theories and models that scientists have created to explain the development of life from non-life.2 I will try to use a minimum of jargon and technical terminology, although some, of course, cannot be avoided. First, the current biological system will be briefly described, and then two major competing models in the field will be presented. Read the rest of this entry »