A recent study says:Human beings need oxygen and air pressuer in order to live.Breathing is made possible by the oxygen in the atmosphere reaching the air sacs in our lungs.As elevation rises,however,atmospheric pressuer goes down as the atmosphere becomes thinner.Therefore the amount of oxygen entering the blood stream declines and it becomes harder to breath.As the air sacs grow narrow and contract,we feel as if we cannot breath. Someone at 5.000-7.500meters above sea-level may faint because of breathing difficulties.That explains the presence of oxygen equipmentin planes and the special system that regulate the air pressuer when planes fly at 9.000-10.000.Anoxia occurs when the oxygen fails to reach the tissues.This oxygen deficiency occurs at height of 3.000-4.500meters. IN THE COMPARISON MADE IN THE VERSE BELOW,this physical truth,the changes that take place in chest with increasing the height,is indicated in these terms(IN THE Holy QURAN centuries ago) ALLAh says"WHEN ALLAH DESIRES TO GUIDE SOMEONE,HE EXPAND HIS BREAST TO ISLAM,WHEN HE DESIRES TO MISGUIDE SOMEONE,HE MAKES HIS BREAST NARROW AND CONSTRICTED AS IF HE WERE CLIMBING UP INTO THE SKY..6:125)" MY Q. IS:if u deny that this Quran is from ALLAH can u make a chapter like it with such a scientific miracle? ALLAH says"AND IF YOU ARE IN DOUBT CONCERNING THAT WHICH WE HAVE SENT DOWN TO OUR SLAVE,THEN PRODUCE A CHAPTER LIKE IT AND CALL YOUR WITNESS BESIDE ALLAH,IF YOU TRUTHFUL"quran. N.B:When ALLAH says about Himself WE,HE means majesty not plural as ALLAH is ONE.