Our body requires the same amount of air in the blood but...

Our body requires the same amount of air in the blood but due to lower density of air, our body receives less of it and lungs respond to it by breathing at a higher rate. Within the first few hours of altitude exposure, water loss also increases, which can result in dehydration. Altitude can also increase your metabolism while suppressing your appetite, meaning you’ll have to eat more than you feel like to maintain a neutral energy balance.

When people are exposed to altitude for several days or weeks, their bodies begin to somewhat adjust (called “acclimation”) to the low-oxygen environment but the breathlessness still remains.

[71] God Says: “ He (God) Makes their chest tight and constricted as if they were climbing up into the sky.” (6:125) Iron was Sent Down to Earth The Quran says that the iron was “sent down” and was not from this earth, to which science also tend to agree that it cannot form on the earth as it would need very high temperatures so it came to earth as a foreign body.

Quran has a chapter (57) on Iron, named as ‘Al-Hadeed’, meaning Iron: “ And We also sent down iron in which there lies great force and which has many uses for mankind …” (Quran 57:25) The first successor of Prophet (c. 600–661) says: and We Sent down the iron, wherein is great strength [57:25], so the ‘Sending down’, is its creation’. [72] The word “Anzalna,” translated as “sent down” is used for iron in the verse, which means earth was devoid of iron and Iron was sent to benefit people.

But, when we take into consideration the literal meaning of the word, which is, “being physically sent down from the sky, as this word usage had not been employed in the Quran except literally, like the descending of the rain or revelation, we realize that this verse implies a very significant scientific miracle. Because, modern astronomical findings have disclosed that the iron found in our world has come from giant stars in outer space.

[73] Not only the iron on earth, but also the iron in the entire Solar System, comes from outer space, since the temperature in the Sun is inadequate for the formation of iron. The sun has a surface temperature of 6,000 degrees Celsius, and a core temperature of approximately 20 million degrees. Iron can only be produced in much larger stars than the Sun, where the temperature reaches a few hundred million degrees.