Touch of the earth: The meaning of the circle

I didn't know that Indian's circle-act was related to the natural world. I didn't even thought about how Indians act, so I was really surprised to know that Indian's circle dance has some reason. Also, I thought this circle act of Indian could be the common thing. It is because I think it's a natural thing to follow to how the nature works as a human beings. And I think it's how the human beings show how they worship the nature.  For example, the windows in Japanese house is sometimes round. I think that's one of the circle-act that Japan has.