Neither tony. Mcway mentioned some believe in spontaneous generation. That just got me thinking about the question I posed. I'm really asking about the scientific explanation for the beginning of life on earth according to Darwinists.
As I’ve said previously and contrary to Deicide's claim, the idea that “evolution doesn’t deal with origin” is (or, at least, was) a falsehood. Origin was addressed, when the theory of evolution was first formulated. But, the tenet behind it (spontaneous generation) was shown to be, at the very least faulty. Yet, many evolutionists (whether they admit it or not) still hold to SG as having occurred. Otherwise, they are left with the one option that don’t float their boat:
The beginning of the evolutionary process raises a question which is as yet unanswerable. What was the origin of life on this planet? Until fairly recent times there was a pretty general belief in the occurrence of ‘spontaneous generation.’ It was supposed that lowly forms of life developed spontaneously from, for example, putrefying meat. But careful experiments, notably those of Pasteur, showed that this conclusion was due to imperfect observation, and it became an accepted doctrine that life never arises except from life. So far as actual evidence goes, this is still the only possible conclusion.
But since it is a conclusion that seems to lead back to some supernatural creative act, it is a conclusion that scientific men find very difficult of acceptance. It carries with it what are felt to be, in the present mental climate, undesirable philosophic implications, and it is opposed to the scientific desire for continuity. It introduces an unaccountable break in the chain of causation, and therefore cannot be admitted as part of science unless it is quite impossible to reject it. For that reason most scientific men prefer to believe that life arose, in some way not yet understood, from inorganic matter in accordance with the laws of physics and chemistry” - J. W. N. Sullivan. The Limitations of Science
How ironic is it that some atheists, who get on Christians fore believing in things "without scientific evidence", turn right around and do the same thing, when it comes to the origin of life on this planet. It happened then; it still happens now.