 There has been a debate on the question to what extent randomness is a genuine feature of creation, and how divine action and chance interrelate. Chance and stochasticity are important features of evolutionary theory (the non-random retention of random variations). In a famous thought experiment, Gould (1989) imagined that we could rewind the tape of life back to the time of the Burgess Shale (508 million years ago); the chance that a rerun of the tape of life would end up with anything like the present-day life forms is vanishingly small. However, Simon Conway Morris (2003) has insisted species very similar to the ones we know now, including humans, would evolve under a broad range of conditions.