I did a quick search, and didn't find anything pertaining to my question. Is there any scientific evidence that a firmament may have once encircled the globe? Or if it is physically possible that such a thing could of existed? Now, by firmament, I am using an interpatation of the passage in genesis referring to God creating the firmament and separating the waters from the waters. It could refer to a layer of water surrounding the upper atmosphere, or possibly just a ring of ice surrounding the planet.