Its about time.
Time is in fact the hero of the plot.
Scientific American, vol. When radiometric dating revealed that the earth was probably 4.6BY old, Darwinists thought they had plenty of time. But then they discovered microfossils 3,500 years old. Thirty years ago, the earliest signs of life on Earth were the fossils of metazoan organisms in rocks no older than seven hundred million years. As the Earth was reckoned to be in the order of several thousand millions years old, there seemed therefore to be an immense interval of time for the formation of the prebiotic soup and the gradual evolution of the cell .