^ Interestingly I didn't retreat to a miracle of the sort you are insinuating. The occupants of the ark 'somehow' surviving I suspect was due to the dedicated preparation. Sure, 'God was with them' but they still had to go to the bother of bulding the ark, collecting the food and applying the pitch. If Noah et al didn't do this then we would not be here typing away.
And the species that didn't become extinct are the species that didn't become extinct!