“And We have made the heavens as a canopy well-guarded: Yet do they turn away from the Signs which these things (point to).” (al-Anbiya: 32) In the verse above, the Quran states that the whole sky is a well-guarded canopy. What does well-guarded canopy mean? Let us hear what scientists say about it: The atmosphere is an ocean of gas surrounding the world, consisting of invisible gases, nearly 10 thousand km thick and harder than stone. For more detailed information, you can visit the websites below. www.questionsonislam.com www.windowsofislam.com www.basicsofbelief.com