If we infidels are going to go around insisting that life arose spontaneously without miraculous intervention, then we’re naturally going to have a keen interest providing an explanation of how that could have happened. To make the story hang together, what’s needed is for some sort of self-replicating molecules to have arisen, and a plausible suggestion as to how that can have happened. (DNA won’t do, as it requires too much ancillary machinery to do its work.)
Progress has been made. Here’s an article that will explain where we’ve got to so far.
P.S. Don’t miss the bit about the fuzzy beast with seven sexes.