Edit: this thread was split off from another where it was off topic https://www.physicsforums.com/threa...gful-to-speak-of-the-density-of-space.843442/ . The question in the original thread was if you could express GR in terms of a density of spacetime. I made a mistake in the following response, and Demystifier explains: The number of degrees of freedom is too small. A density field has one degree of freedom. The metric has 10. You cannot replace something with 10 degrees of freedom by something with 1.