This is a simple and a bit naive question. I understand that a miracle everywhere is a super natural force unexplainable by current state of science.
The Purim story looks all natural, nothing truly extraordinary.
I heard some refer to it as "hidden miracles", but I find it difficult to grasp, aren't those hidden miracles called "the nature"?
So what miracle(s) do we mean saying Nes Purim and Al Hanissim?