What is gravity?
Gravity is the absorption of the quanta of space by particles of matter.
Why does gravity exist?
Gravity exists because elementary particles (electrons, quarks, and neutrinos), are NOT static with time and expansion. Matter is dynamic; elementary particles must continually accrete energy (the quanta of space) in order to conserve the continually increasing angular momentum of the expanding universe. The process of particle creation is ongoing, and gravity is a manifestation of the ongoing particle creation process.
The key to gravity is matter. In the section, papers, and videos on matter, we have argued that matter exists to conserve the angular momentum and centripetal force of the universe. The hyperverse is coalescing, and shrinking, the quanta of space, in order to conserve angular momentum and centripetal force. Due to expansion, the angular momentum of the universe continually increases, and thus, conserving angular momentum is an ongoing process. Particles of matter must continually accrete the quanta of space, and this continual accretion of space, by particles of matter, is gravity.
Space is gravitated, but it does not gravitate. It is matter that does the gravitating. Gravity exists because the universe is forced to conserve angular momentum and centripetal force. The process is ongoing, and this is what we see as gravity.
Gravity is the continuing absorption of space by matter
Matter absorbs space; it does not curve space. Matter is space, concentrated and crushed down, and the process is ongoing. The absorption process follows an inverse square law. A common model, or analogy, of curved space is the use of a rubber sheet deformed by a massive ball. We can model the absorption of space by matter, using a basin full of water, and then pulling the plug. The speed of movement of the water into the drain varies with the distance from the drain. When this idea is applied to three dimensions, we get the inverse square law, as we find with gravity.
The degree of curvature of space is replaced with the velocity of space. We can substitute the phrase "curvature of space", with "velocity of space".
In the papers and videos presented here, we show that the centripetal force of the quanta of space IS THE SAME FORCE as gravity. The centripetal force of the quanta of space, derived in the geometric mean paper, actually calculates out to be the force of gravity. Within the bounds of the quanta, this center-seeking force is the centripetal force, but outside the boundary of the quanta, this force is the gravitational force.
Gravity exists because space expands
A rather philosophic view is this: gravity exists because space expands. Gravity is a manifestation of the expansion of space in our daily lives. Particles exist to conserve the angular momentum and centripetal force of the hyperverse, and because of expansion, the angular momentum keeps increasing. Particles of matter must continually accrete the quanta of space to conserve their angular momentum.
See the second half of the paper: "On the Origin of Matter and Gravity: What They Are and Why They Exist".