>>I question that fact. If at one point it was a complete land mass, where did the water come from?<<

Perhaps the water was under the land masses in a way similar to Walter Brown's Hydroplate Theory:
[link to www.youtube.com]

I think that the Earth could expand without gaining mass, if there was rising pressure, and allowed the formation of gaseous pockets.

By the way, the narrator says "Conspiracy of Silence" not "Science".