I have one simple question on this: Was the scriptural reference on "circle of earth" really trying to describe anything about cosmology? Or was this just an expression somewhat like -
"all around" or "all over" the earth - without any particular emphasis on the shape of the earth?
BTW, I once debated with an Islamic who claimed that the Koran was superior because he thought it said the earth was shaped like an egg. I responded first with the above, then afterward with the simple fact that the earth looks a lot more like a circle/sphere from space than it does like an EGG!!! (you really cannot see the equatorial bulge with the naked eye) - and even if you could, it is not anything like an egg.