the water cycle in nature. This is a topic which is well known today. Consequently, the verses in the Qur’an that refer to the water cycle seem to express ideas that are now totally self-evident. But if we consider the ideas prevalent at that time, they appear to be based more on myth and philosophical speculation than on observed fact, even though useful practical knowledge on soil irrigation was current at that period.

Let us examine, for example, the following verse in chapter az-Zumar:
“Have you not seen that Allah sent rain down from the sky and caused it to penetrate the ground and come forth as springs, then He caused crops of different colors to grow…” Qur’an,39:21

Such notions seem quite natural to us today, but we should not forget that, not so long ago, they were not prevalent. It was not until the sixteenth century, with Bernard Palissy, that we gained the first coherent description of the water cycle. Prior to this, people believed that the waters of the oceans, under the effect of winds, were thrust towards the interior of the continents.

They then returned to the oceans via the great abyss, which, since Plato’s time was called the Tartarus .In the seventeenth century, great thinkers such as Descartes still believed in this myth. Even in the nineteenth century there were still those who believed in Aristotle’s theory that water was condensed in cool mountain caverns and formed underground lakes that fed

springs. Today, we know that it is the infiltration of rain water into the ground that is responsible for this. If one compares the facts of modern hydrology with the data found in numerous verses of the Qur’an on this subject, one cannot fail to notice the remarkable degree of agreement between the two.

https://www.youtube.com/watch?v=StPobH5ODTw

https://www.youtube.com/watch?v=KJXk6eG6Y-A

https://www.youtube.com/watch?v=TiLBGHwX_4c

https://www.youtube.com/watch?v=fluiDCYCVhw