Muhammad, peace be upon him, was unlettered. He could neither read nor write, and he grew up in Makkah where there were no schools. He lived far away from the circles of science and scholars that existed in Syria, Alexandria, Athens, or Rome. Moreover, the scientific facts mentioned in the Qur'an were not known in that time, i.e. in the Seventh Century A.C. Having studied and examined the Arabic text of the Qur'an, Dr. Bucaille marvels:

I could not find a single error in the Qur’an. I had to stop and ask myself: if a man were the author of the Qur’an, how could he have written facts in the Seventh century A.C. that today are shown to be in keeping with modern scientific knowledge? I had to acknowledge the evidence in front of me: the Qur’an did not contain a single statement that was assailable from a modern scientific point of view. I repeated the same test for the Old Testament and the Gospels, always preserving the same objective outlook. In the former, I did not have to go even beyond the first book, Genesis, to find statements totally out of keeping with what modern science considers to be indisputable facts.

Dr. Bucaille studied many scientific facts mentioned in the Qur’an such as the creation of the universe, astronomy, the animal and vegetation kingdoms, human reproduction, and other related issues.