Define simple to more complex.
We have never observed, either in real life, or in the fossil record, any line leading from simple organisim to a more complex organism. For instance, there is no evolutionary line from fish to man (as evolutionists would have us to believe). Instead, what we find are organisms that appear quite suddenly in the fossil record, and the ones where we can trace them up to modern times devolve (in most cases only slightly) from their original kinds.