Why does the universe exist?

Question:

Why does the universe exist?

Was there ever a time the universe didn't exist? If so, what exactly would be "nothingness"? If not, how is that possible? If it involves a God, who/what created God?

Best Answer - Chosen by Asker: Why not?
the laws of the universe according to Einstein suggest that matter cannot be created nor can it be destroyed so if this is mathematically true then the universe always has been ....