In this insightful book, renowned geologist and scholar Dr. Zaghloul El-Naggar explores the Quranic miracle of the alternation of night and day. He delves into the scientific facts from astronomy, geology, and physics that govern this daily phenomenon. El-Naggar masterfully demonstrates how these complex scientific realities, only discovered in modern times, were precisely mentioned in the Quran over fourteen centuries ago. This work serves as a powerful testament to the divine knowledge within the holy book, inviting believers and skeptics alike to reflect on the intricate design of the universe as a sign of the Creator.