rofl…
Sound like John Haggie,
There is no pre-adamite civilization, there was a wonder paradise across the whole globe before the FLOOD, thats when your Nephilim, etc would have lived.
Thats who built the pyramids.
one very good theory is the world was hit by a comet, the created the ice Age, and left massive amounts of snow on the poles, also cracked the ice shell that surrounded the world.
Waters above and below the firmament.
Birds fly through the firmament.
Either you believe your KJV or you don't doesn't matter to me.
But at least if your going to believe in a creation and Adam/Eve you must believe it was the beginning…
Who knows Antartica could have been Atlantis and the impact of the comet caused a pole shift and left it on the bottom of he world.