Ultimately, the whole universe was brought into existence at the big bang (another belief I have that is corroborated by what the Quran says).
While I'm aware of the scientific miracles in the Koran - the Koran's accurate description that fresh water and salt water do not mix, the rejection of the modern theory of evolution and its belief that humans are descendants from lower primates, along with the mathematical and historical miracles in the Koran, such as the belief that the Jews worshiped Elijah, I would like to investigate this claim and look at the passage(s) in the Koran which talks of the creation of the universe.
So, I'll hand this off to shafique to cite the passage in the Koran which talks of the big bang and the formation of the universe.