Sorry, but the Genesis 1:6-8 (bible) also have separation of heaven and earth on the 2nd day of creation, so the Qur'an (21:30) provide nothing new, unique or insightful.
Please compare Qur'an and bible, I couldn't find any same concept between Genesis 1:6-8 (bible) and 21:30(Qur'an):
21:30(Qur'an):
"Have those who disbelieved not considered that the
heavens and the earth were a joined entity, and We
separated them and made from water every living thing? Then will they not believe?"
This verse says that heavens and the earth were a single thing and then are seprated from each other. Then all living things have been created from water. I can not find these concepts in Genesis 1:6-8.
Genesis 1:6-8 (bible)
6 And God said: 'Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.'
7.And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament; and it was so.
8 And God called the firmament Heaven. And there was evening and there was morning, a second day.
But the separation of heaven and earth, in which heaven is nothing more than the visible sky. Heaven in the Qur'an has nothing to do with the universe. Other names for heaven or sky, are firmament, dome, expanse. The expanse or sky/heaven have nothing to do with the Big Bang or the expanding universe.
Separation of heaven
s and eart, not heaven and earth.
There are verses in the Noble Qur'an that mention sky. But heaven
s are different from sky.
Genesis also say everything come from water, in Genesis 1:2. Again nothing new.
Genesis say everything come from water(I can not find this in Genesis 1:2). But Qur'an says all
living things are from water.
And beside the passages from Genesis, there are other polytheistic religions earlier than Genesis as well as the pitiful Qur'an, which separate heaven and earth, can be found in Egyptian and Sumerian-Babylonian sources, which had clearly influenced all Abrahamic religions, including Islam.
Islam is only perpetuating the same myths as the Egyptian and Babylonian myths, indirectly from Jewish and Christian texts, but clearly you are too ignorant to know the historical sources of your own religion. Muslims are blinded by their own religion to see the truth the origin of their own religion.
You can think we are blind.
25:5, 6 "And they say, "(Qur'an is) Myths of the former peoples which he has written down, and they are dictated to him morning and afternoon."«5»Say, [O Muhammad], "It has been revealed by He who knows [every] secret within the heavens and the earth. Indeed, He is ever Forgiving and Merciful.«6»"