Is belief in God or the Bible necessary to believe in a massive flood.

There are some interesting floods that do not require belief in God or the Bible to believe occurred. They tend to coincide with the glacial melting at the end of the last glacial period, and some people argue that these might be the origins of the flood myths we see a lot of today.As it stands though, there is little evidence that suggests that there was a flood that covered all parts of the earth simultaneously, and if the Mars theory pans out, it would just go to show that such a phenomena are so obvious that a few robots, a telescope and a probe or two are sufficient to detect it even when the event occurred a long time ago millions of miles away. Given how much easier it is to study earth's geology, I think it should be apparent that the confidence we have in the lack of a global flood should be fairly high.Edited by Modulous, : No reason given.