God of the Qur'an does Exist

Now to know that God exists we need to answer if the Qur'an is indeed from God. God's word needs 4 qualification to be God's word: 1.Mention it is God's word 2. Has signs to prove it is from God 3. No errors and contradictions 4.No changes/ corruptions Point No.1: God says in the Qur'an that it had been from other than Allah, then you'd find many contradictions: Then do they not reflect upon the Qur'an? If it had been from [any] other than Allah , they would have found within it much contradiction. Examining the Qur'an we can understand that it has no contradictions therefore it is from God. Point No.2: Qur'an in many accounts shows signs that this book is from God. Although in the Qur'an God mentions many scientific things as SIGNS for people to understand, that this is not from Human beings, let me mention you some of the scientific miracles(there are 1000 verses that speak about science). Big bang & Every living thing is made out of water: "Have those who disbelieved not considered that the heavens and the earth were a joined entity, then We separated them, and made from water every living thing? Then will they not believe?" (Quran 21:30) When God separated the Heavens and the Earth the Big bang occurred, it did not come out of nothing. Expanding Universe: 51:47 "And the heaven We constructed with strength, and indeed, We are [its] expander." The mentioning of Orbit: 21:33 "And it is He who created the night and the day and the sun and the moon; all [heavenly bodies] in an orbit are swimming." Cloud Formation: "Have you not seen how God makes the clouds move gently, then joins them together, then makes them into a stack, and then you see the rain come out of it...." (Quran 24:43) The preceding verse, after mentioning clouds and rain, speaks about hail and lightning: "....And He sends down hail from mountains (clouds) in the sky, and He strikes with it whomever He wills, and turns it from whomever He wills. The vivid flash of its lightning nearly blinds the sight." (Quran 24:43) Meteorologists have found that these cumulonimbus clouds, that shower hail, reach a height of 25,000 to 30,000 ft (4.7 to 5.7 miles), like mountains, as the Quran said, "...And He sends down hail from mountains (clouds) in the sky..." . Iron is not from Earth but sent down: "And We also sent down iron in which there lies great force and which has many uses for mankind"" (Quran 57:25) Iron is formed by nuclear fusion inside older stars. When these stars exploded as supernovae, the iron was spread throughout the universe, and eventually became part of the material used to form our solar system. Therefore we conclude that God, or maybe you'll say that Muhammad pbuh wrote the Qur'an, Muhammad pbuh was very smart to know that Iron is not from earth, obviously this is from God not Muhammad pbuh. The Roman Empire prophecy: In the years 613 - 614 C.E the two Empires went to war, with the Byzantines suffering a severe defeat at the hands of the Persians. Damascus and Jerusalem both fell to the Persian Empire. In the chapter, The Romans, in the Holy Quran, it is stated that the Byzantines had met with a great defeat but would soon gain victory: "The Romans have been defeated in the lowest land, but after their defeat they will soon be victorious. Within three to nine years. The decision of the matter, before and after, is with God." (Quran 30:2-4) These verses, above, were revealed around 620 C.E, almost 7 years after the severe defeat of the Christian Byzantines at the hands of the idolater Persians in 613 " 614 C.E. Yet it was related in the verses that the Byzantines would shortly be victorious. In-fact, Byzantine had been so heavily defeated that it seemed impossible for the Empire to even maintain its very existence, let alone be victorious again. This is how the Quran has described mountains. God has said in the Quran: "Have We not made the earth as a bed, and the mountains as pegs?" (Quran 78:6-7) Modern earth sciences have proven that mountains have deep roots under the surface of the ground and that these roots can reach several times their elevations above the surface of the ground. So the most suitable word to describe mountains on the basis of this information is the word "peg," since most of a properly set peg is hidden under the surface of the ground. The history of science tells us that the theory of mountains having deep roots was introduced only in the latter half of the nineteenth century. Mountains also play an important role in stabilizing the crust of the earth. They hinder the shaking of the earth. God has said in the Quran: "And He has set firm mountains in the earth so that it would not shake with you..." (Quran 16:15) Likewise, the modern theory of plate tectonics holds that mountains work as stabilizers for the earth. This knowledge about the role of mountains as stabilizers for the earth has just begun to be understood in the framework of plate tectonics since the late 1960"s. Also many scientists approve of the Qur'an as The Word of God, i.e. Keith L. Moore. Point No.3: As I mentioned earlier the Qur'an has 0 errors and contradictions, if you can mention one, i will replay to them in my Rebuttal. Point No.4: As we know the Qur'an has stood the test of time, by being preserved for a period of 1400 years, God said in the Qur'an that he will preserve it, 15:9 "Indeed, it is We who sent down the Qur'an and indeed, We will be its guardian." If you can show one Arabic Qur'an different from any other Qur'an or a manuscript, then i denounce Islam, this is a challenge.