Abstract
We present four arguments that gravity is the third spacial dimension of spacetime. The first three of these arguments are reinterpretations of "old" science and the fourth argument is "new" science, in that the findings haven't been the subject of one research paper. Along the way, we will show how our understanding of gravity has changed over time and the specific findings that changed our understanding of gravity. This will lead to a contrast between gravity is a force and gravity is a dimension. A summary of the fourth argument is; forces map both positive and negative to spacetime while dimensions map only positive to spacetime, since gravity maps positive to spacetime then gravity is a dimension.
james r. akerlund