We are not necessarily saying that your interpretation is incorrect, rather we are saying that either 1) your claim that they didn't know this 1,400 years ago is unfounded, or 2) the author could have had a different interpretation which is equally valid.
While embryos may resemble a leech or a "chewed like substance" at various stages, how would they have not known this 1,400 years ago? Miscarriages were extremely common back then so it's not like embryos would not have been available for examination.
Peace4all says that the line "and the mountains as pegs" describes mountain roots which exist far below the Earth's crust, but how do you know they weren't equating mountains to the stakes that held their tents in place?
Just because you choose to interpret it a certain way isn't proof of divine inspiration.
First of all, such claims could not have been made by just observing miscarriaged babies. The scientists of modern age are not stupid, to have spent so many thousand dollars for equipment, which showed them the appearance of embryo etc. when it was simply a case of studying miscarriages.
The only slight significant knowledge of embryos was with Greeks. And It has been proven in a previous post ( As a response to Fluffy) that these could not have been copied from Greek books.
The answer to mountains part too had been posted before, let me post it again:
"Well, I did some research on the net and there is no denying that mountains indeed have deep roots. If you are unsure search Google on topic of isostasy and mountain formation etc. I think that peace4all is trying to imply is, that as we all know that large parts of earth's lithosphere is floating on the underlying layer, the asthenosphere, the mountains having deep roots ( look at it logically) having deep roots, would hinder movements caused by such floating. ( i took some info from information available on online Britannica)
As far as language of Quran is concerned, well it's in the form of poetry. The Quran was not only revealed for this particular age you know. When it was revealed, particularly in Arabia, literature was given most importance. Infact, Arabs were at height of literature and in arrogance used to call, those unable to speak Arabic "dumb" . Thus, the Quran was revealed to show that their literature was nothing compared to Quran's literary excellence.
You are saying that "pegs/stakes" is wrongly used. The word is being used to describe mountains and as I have made clear in my previous posts, mountains do have deep roots. Now consider a stake, it is driven in the ground such that majority of it's part is beneath the surafce, and so do mountains. Stakes and pegs are used as comparisons to "deep roots" of mountains. And seeing that mountains indeed have deep roots, which in fact are more longer than the part above land, the Quran is completely accurate.
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First of all the verse did not say tent pegs. It just said pegs. Even if you argue, I believe that both descriptions can fit.