Complex sentence: After a few hundred years, Hovind claims the ice caps melted and the ocean levels increased, creating the continental shelves, and the deeper oceans absorbed carbon dioxide in Earth's atmosphere allowing greater amounts of radiation to reach the Earth's surface.
Split into simpler sentences: After a few hundred years, Hovind claims the ice caps melted and the ocean levels increased, creating the continental shelves. The deeper oceans absorbed carbon dioxide in Earth's atmosphere allowing greater amounts of radiation to reach the Earth's surface.