The bible claims, two of each species could fit into a space 300x50x30 cubits. Science shows there are between 3,000,000 (known) and 100,000,000 (potentially) species, including around 6,700 species of mammals. Science shows the ark claim is ludicrous. Science (geology) also shows there was no global flood, but does show there was a large flood over river basins around mount Ararat, the likely source of the story.