Quantum Gravity

One of the two so-called "fundamental forces" of physics that can be constantly observed on a macroscopic basis, gravity refers to the force that pulls objects to the ground, affecting large and small objects alike.  At a quantum scale, gravity is allegedly far weaker than it is at the normal scale of human sensory experiences--to the point where particle behavior seems random and more unpredictable than that of objects at a macroscopic scale.  All science is inescapably probabilistic and therefore unpredictable in an ultimate sense, but this is moreso the case when it comes to reported quantum activity.

There are two main possibilities for why the nature of quantum gravity is different from "ordinary" gravity (if the alleged differences exist at all): it either 1) is different from macroscopic gravity in the same way that other aspects of quantum behaviors might not match those of the macroscopic world, meaning that different scientific laws apply at different scales, or 2) there is simply more to laws like gravity than initially seems to be the case.  While these two possibilities may seem similar to some, they are objectively distinct on a scientific and broader philosophical level.  In either case, quantum gravity, if it exists in the way it is claimed to, differs from macroscopic gravity.

Gravitational attraction correlates to mass, and mass often correlates to size.  Since any object at the quantum level would be extraordinarily small compared to even miniscule macroscopic objects, why would it be surprising that subatomic particles are not affected by gravity in the same way that macroscopic objects are?  Subatomic particles, if the general correlation between size and mass holds at the quantum scale (that is, if subatomic particles even exist in the first place, as even atoms cannot be philosophically proven to exist [1]), would have very little mass.

That gravitational forces influencing subatomic particles are seemingly very weak by comparison to macroscopic gravitational forces does not necessarily mean that there are two different forces of gravity, but it does exemplify that macroscopic and quantum events do not have to share the same traits.  It is possible to realize that scientific laws could differ across different regions without having ever heard of quantum physics, as uniformity of scientific phenomena like gravity is not a logical necessity.  It should thus be unsurprising on one level that there is more to theoretical and observational science than that which is perceived in everyday life.


[1].  https://thechristianrationalist.blogspot.com/2019/04/the-existence-of-atoms.html