Although it is true that the Quran is not a science book but still there are statements about nature in the Quran. And since Allah is the Creator of the universe and has full knowledge about it therefore, any information about nature that Allah gave in the Quran is true. When it is shown that when a book revealed 14 centuries ago has information that was only recently discovered by science, then of course that shows that the Book had a divine source and couldn't have been written by man.
To disqualify this fact, people like the various atheists try to prove that the Quran doesn't have such statements. Either by saying that the statement isn't in the Quran or by stating that the original translation wasn't the same as the current translation and some people are changing the translation of the words of the Quran. But this is not true.
The two verses quoted by the atheists mean exactly as are given in Harun Yahya's book (and other translations of the Quran). And if we look at the arabic word, we'll see that they do point to the scientific facts.
The first verse is Verse 39: 6, which states يكور اليل على النهار و يكور النهار على الليل... meaning "...He wraps the night over the day and wraps the day over the night..."
the word for wrap is يكور , the root form of which is كور which means round. تكور means to roll. These are original common translation. A very common word in Arabic from the root word is كرة which means ball. كرة القدم also very commonly used means football. So it's not true that the meaning of the word يكور is being changed by Muslims to fit claims that there are scientifically proven statements in the Quran which were not known to humans of 7th century.
The other verse is verse 51: 47 which states "And the heaven We constructed with strength, and indeed, We are [its] expander"
The word in the Arabic text is لموسعون which comes from the word موسع which means to expand. ل that precedes the word (لموسعون ) means 'certainly, definitely, indeed.'
So the atheists claims are absolutely false. The words of the Quran are translated exactly as they always were and the translations is according to Arabic usage of the words. Words are not being mistranslated. There really are scientifically proven statements in the Quran. Truth is that the current translation of the word يكور (wrap) doesn't even give it's complete meaning. When you look at the meanings of the word يكور - كور - تكور you can visualize what the verse is really stating and how it is pointing to the movement of day and night around the earth! Visualize how light and darkness move slowly around the earth, just as the verse is stating.