The odd mix of various
chemicals, both
organic and
inorganic, that collected on the surface of the early
earth, and eventually resulted in the formation of
life. However, it didn't happen
quicky, but in many many
steps.
Creationists, who believe that everything just appeared after god said so, say the odds are way too much against this. They say this because they expect to see DNA form directly from a random batch of inorganic elements.