I don't believe in the theory of gravity. Or rather, I have serious doubts. Now let me be clear: I know gravity as a phenomenon exists. That's plain. I simply have issues with the explanation. I don't believe gravity is a force. I don't think matter exerts a pull on other matter. And I have reasons.

First of all, Newton himself said the theory rested on an essential assumption: that all space is absolute. Does this really make sense? Not even in our limited experience. As pointed out in the book The Ascent of Man this is similar to primitive man's belief in a flat earth. The area nearby seemed flat so he assumed it was the same elsewhere. Yet it simply wasn't so. Not to mention Einstein showed that not many things are constant or fixed.

Secondly, recent observations in the cosmos seem to contradict our idea of gravity. Look at galaxies. According to scientists they're spinning much faster than they should be. There isn't enough matter in these galaxies and according to the theory of gravity should be tearing apart. Only they aren't. So scientists, rather than rethink anything, came up with dark matter. Only nobody knows what dark matter is, what it looks like. It's unable to reflect any type of light and other matter can pass through it with ease. Personally I think its a desperate and crude explanation.

So what do I think is the reason the Apple fell to the ground? Saddle points in space which allow mass to move in some directions easier than others. Which is why after the big bang matter coalesced like it did. It formed in these saddle points and still move along them. This explains the order of the universe.