There are hundreds of stories that pre-date the Noah's ark story from many different cultures.
This leads rational thinking people to believe that somebody when writing the bible thought "this is a good story to scare people into not lying, but since we all know that the entire earth never flooded ill put this little bit in about god being happy with killing everyone off save one mans family and that he wont do it again"
And just to cover bases there is NO SCIENTIFIC EVIDENCE that supports that the entire earth flooded at the same time. An event like this would leave tons of evidence not only fossils of the humans that died all over the world at the same exact time but also all the animals that died and the plants. Oh yes and the fact that there would of been huge silt deposits all over the earth at the same exact point in the rock layers.
This is science by rational thinking people, not the ones who bias there results to make it seem like their always right.
