December 27, 2013
We tend to think of gravity as always being attractive, but actually it changes its direction and can become repulsive. An example of this effect of gravity reversing direction is that the Moon falls away from us instead of towards us. In common usage of terminology, people tend to try to cover up in the words that they use the fact that anti-gravity exists, because their thinking processes are not geared to thinking of gravity as reversing direction. Of course, gravity being both attractive and repulsive is further example of the utility of Boscovich's theory.