The bible flood has the whole world covered with water, over the top of the mountains, where the Ark was afloat for a about a year before land was sighted (where did all that water come from and go). Which is impossible. A wooden boat of that size would quickly fall apart through wave action. All the animals need food for a year, tons of food, tons of waste to be shoveled, etc, etc...not to mention marcupials had to go to Australia, Wildebeest to Africa...all of this only four and a half thousand years ago.
