Not since the ocean rose to submerge the ancient coastal cities of the Ice Age has the sea level risen, which tells us that the earth’s hydrologic cycle has received no significant extra input of heat since that time, including no excessive heating of the ocean from below for the sea level to lower because of more water taken off the surface by evaporation. This simple hydrology reveals what was the engine for the Ice Age, the ocean warmer top to bottom in the aftermath of Noah’s Flood.