“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?"

Versus actual scientific explanation: https://www.exploratorium.edu/origins/cern/ideas/bang.html#:~:text=The%20universe%20began%2C%20scientists%20believe,titanic%20explosion%20the%20Big%20Bang.

(Oh and that was about 13 billion years ago - not over 6 days).