To be fair, I do indeed presume to know how the flat Earth was formed. My model of the universe is one where the Big Bang caused a superplasmic mixture of helium and hydrogen, which I refer to as aether, which has near infinite fluidity (it is not affected by van der Waals forces). Now, this aether abhors vacuums far more than other states of matter and can travel forever without losing significant energy (unless it hits something), both due to the aforementioned fluidity. Thus, there is an aetheric wind which expands into the universe, filling the infinite vacuum. The Earth rides on this wind, and has been flattened by the force of it.