Outside of "myth" and whether or not you believe in the bible version or not, there is a layer in there earth that is testament to a worldwide flood. I have no idea whether this is the biblical flood or a freak of nature.

The likelyhood of this being the cause of the earth's tilt is a bit wild though. It's odd that you'd say that a nice warm climate would be perfect. I assume that means that only humans (or even more specifically you) require the perfect climate. Etremes of both hot and cold are necessary for different forms of life to thrive. animals and plants.

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