There's the Earth and floating above it,encompassing it,is an opaque shield...protecting us from direct sunlight and encapsulating the moisture and atmosphere. The Earth was,in effect,a terrarium! How cool is that?
When man fell and sinned and God wanted to destroy the Earth...He got Noah to build the Ark, put all the animals on the Ark and...sent a meteor to strike the "glass dome" over the Earth. Baugh theorizes that the dome was made of ice or a similar substance. When it was broken it fell to Earth and melted,adding to the flood!