There is no doubt that the Holy Quran is not a book about natural sciences, medicine, psychology or mathematical studies.
The Holy Quran is a book of guidance and one which builds a human being. It mentions whatever is necessary for one to know.
We should not expect that the Holy Quran be an encyclopedia about the various sciences. We should seek the light of faith and guidance, piety and purity, humanness and ethics, order and law from the Holy Quran and it contains all of these. But sometimes in order to reach this goal, the Holy Quran indicates some of the natural sciences and the secrets of creation, in particular, in its lessons on unity; it removes the veil over the secrets of the world of creation and it discloses facts which were unknown to the scholars of that era.
This expression of the Quran forms a complex which we call the intellectual miracles of the Quran. Here we will indicate some of the intellectual miracles of the Holy Quran.