of the Islamic Research Foundation International, Inc. and Sheikh Omar Suleiman of the Yaqeen Institute for Islamic Research argue that the scientific theory of an expanding universe is described in Sūrat adh-Dhāriyāt: Some modern scholars understand that the "smoke/gas" mentioned in Surah Fussilat could be referring to the state few minutes after the Big Bang when the universe was primarily hot Hydrogen and Helium: The time period described is 6 periods for this whole creation, most Muslims hold the view that, these 6 days are not solar days rather a different relative time, which starts from the beginning of universe. The Fatimid Muslim thinker al-Mu’ayyad fi’l-Din al-Shirazi rebukes the idea of the creation of the world in 6 solar days of either 24 hours, 1000 or 50,000 years. He questions both how creation can be measured in units of time when time was yet to be created, as well as how an infinitely powerful Creator can be limited by the constraints of time, as time itself is part of his own creation. The word is understood, within the Qur'an, to be a long period of time—an era or eon. Therefore, Muslims interpret the description of a "six days" creation as six distinct periods or eons. The length of these periods is not precisely defined, nor are the specific developments that took place during each period. Mustafa Khattab in his Quranic translation states that "The word is not always used in the Quran to mean a 24-hour period. According to 22:47, a heavenly Day is 1000 years of our time. The Day of Judgment will be 50 000 years of our time (see 70:4). Hence, the six Days of creation refer to six eons of time." The concept of a "day of rest" does not appear in the Quran, and in fact the concept that God needed rest after the creation from tiredness is explicitly denied in a verse: Creation of life The emergence of life is mostly mentioned in Quran during discussion of creation of man. According to Quran the life has its origins from a single being, with some modern adherents considering it as the LUCA. The Quran states that every human's existence starts from extract of organic soil. The only explicit reference to the creation of non-human life in the Quran appears in Sūrat al-Anbiyāʼ, in which the Quran proclaims "We made out of water every living thing".