And' We have made from water every living thing'

 Allah, Most High, says:


وَجَعَلْنَا مِنَ ٱلْمَآءِ كُلَّ شَىْءٍ حَىٍّ ۖ أَفَلَا يُؤْمِنُونَ ﴿۰٣﴾                    


 And We haveade from water every living thing. Will they not then believe?" (Sr, Al-Anbiya 21:30)

    This Verse was understood by the earlier generations, and by people in our own time, and it will be understood by people in the future quite clearly: wateris the basis of life.
    Secienific progress has shown us many details that confirm this concept. Water is the basis of all life, and all created begins from the virus cannot be seen exept with an electronic microscope to the entire plant and animal kingdoms could not exsist without water. But the ratio of water may differ; for example, the ratio of water in the bodies of desert plants and animals is very low, and the ratio of water in the bodies of marine plants and animals very high. But water is enssential, because water is the basis  for all biological, metabic functions and chemical interactions inside sells. It is an exellent solvent and is essential for the transfer nutrients and waste to and from cell and tissues.

Ocean waves and coastal erosion

   The waves shape and eat away at the shoreline, taking from the edges of the land. Allah, the Exalted, says:

 ( أَوَلَمْ يَرَوْا۟ أَنَّا نَأْتِى ٱلْأَرْضَ نَنقُصُهَا مِنْ أَطْرَافِهَا ۚ)

See they not that We gradually reduce the land from its outlying borders? (Sr, Ar-Ra'd ; 13:41)

( أَوَلَمْ يَرَوْا۟ أَنَّا نَأْتِى ٱلْأَرْضَ نَنقُصُهَا مِنْ أَطْرَافِهَا ۚ)

See they not that We gradually reduce the land from its outlying borders? (Sr, Al-Anbiya; 21:44)

Explanation

   

   Ibn Mardaih narrated that Abu Hurairah, may Allah be pased with him, said. " The Messenger of Alloh, peace and blessing of Allah be upon him, said concerning the word 'We gradually reduce the land': 'It means the disappearance of the scholars'."

  It was narrated by 'Abd Ar-Razzaq, Ibn Abi Shaibah, Nu' aim Ibn Hammad in Al-Fitan, Ibn Jareer, Ibn Mundhir, Ibn Abi Hatim an Al-Hakim, who classed it as saheeh, that Ibn 'Abbas, may Allah be pleased with them, said concernig the pleace the prase "We gradually reduce the land: 'It means the death of scholar and Fuqaha' (jurists) and the disappearance of the best of its people."

  Ibn Abi Shibah and Ibn Jareer narrated from Mujahid that the phrase "We gradually reduce the land" means the death of the scholar.

  Abdu Ibn Humaid narrated that Al-Dahhak said concerning the phrase ''We gradually reduce the land": Dig they not see that We granted to Muhammad, peace and blessing of Allah be upon him, the coquest of one land after another?

  Ibn Jareer, Ibn Mundhir and Ibn Abi Hatim narrated that Ibn 'Abbas, may Allah be pleased with concerning the phrase "We gradually reduce the land'': (It means) a decreas in the number of inhabitants and blessing.

  

  Ibn Jareer narrated that Mujahid said concerning the phrase "We gradually reduce the land": ( it means) its destruction.

  Sa'eed Ibn Mansoor and Ibn Mundhir narrated that Abu Malik said conserning the phrase "We gradually reduce the land": (It means) the town that was partially destroyed.

The estuary region and the characteristics of the partition

Scientists have noted the differences between the three categories of  water (river, sea and estuary) with regard to the degree salinity or freshness, and they have found that most creatures that livee in the sea, river and estuary die if they are taken out of theirown environment. That which lives in the river cannot live sea or estuary, and so on.

  Then they classfied the three environments (river, sea and estuary ) on the basis of the creatures that live in them, and they foundbthat the estuari region is regraded as a barrier that is exclusive to most of the creature that live in it, which cannot live anywhere but in an aquatic environment that has a certain leved  of salinity or freshness, and they die if  they go out of the estuary region.

  In addition to that, the estuary region is regarded as a barrier that excludes most of the creatures that live in the sea and river, because these creatures will die if thgey enter this region, which is also due to the water pressure. The wonder is that the Qur' an described the estuary region  in these terms and said "a complete partition". We can understand the world Hijr  (partition) here in the light of modern studies which show that living creatures in the estuary region live in a narrow space and are preventedfrom leaving that space.
  
  The estuary region is also described as being forbidden to othe living creatures which cannot enter it.

Barrier between two salty seas

Modern stuies have discovered that even though the seas appear to be all the same, there are several differences in their water mass. In regions where two seas meet, there is a barrier between them. This barrier separates the two seas that each sea has its own temperature, salinity and density. (asas 'Ilm Al- Bihar,asas ' Davies, p. 92-93).
    The water of the warm, saline Mediterranean Sea has a barrier where it enters the Atlantc Ocean which is colder and less dense. There are  similiar barrier between the waters of the Red Sea and the Gulf of Aden. What modern science discovered in the last century was clearly stated in the Qur'an  Sr, Al-Rahman, where Allah, the Exalted, says:

مَرَجَ ٱلْبَحْرَيْنِ يَلْتَقِيَانِ ﴿٩١﴾    
"He has letloose the two seas (the salt and freshwater) meeting together."

    The Qur'an speaks of two different salty seas meeting. The evidence for that is what was stated by the Scholars of Trafseer, which is that when the Qur'an uses the word Al-Bahr without specifying, it refers to the salty sea. Moreover, if the two seas were similiar to one another, they would be a single sea. This differentiation between them in the Qur'anic wording strongly indicates that there is a difference between them, even though both are salty.

  Another indication referred to in the Qur'an Verse is that it says of the two seas the pearl and coral come out of them. Scientists have discovered that pearl and coral can only be found in salty sea; they do not exist in freshwater or in where freshwater with the sea.

  In 1942, scientific studies of the sea revealed the existence of a water barrier that separates the two seas the meet. This is what is indicated in the verse: " Between them is a barrier which none of them can transgress'' (Sr, Al-Rahman; 55:20). The idea of the barrier is reinforced in the verse: "....and has set a barrier between the two seas" (Sr, Al-Naml; 29:61). The phrase "none can transgress" means that one of the two seas cannot prevail over the other and change its characteristics. It also became clear to scientists that there is some mixing between the salty seas despite the existence of this barrier, and this is what is indicated by the Qur'an.