Gravity is a universal feature on Earth that all living creatures experience daily. However, it is subtle enough that, for the most part, we do not notice it.

We realize gravity when we drop something. That’s when we understand that the weakest of the four fundamental interactions known to physics has a significant impact on everything around us while being invisible.

Nearly 1029 times weaker than the appropriately named weak force, which regulates the radioactive decay of atoms, gravity is so subtle that it has almost no effect at the subatomic level. Yet, at the scale where interactions between objects are noticeable, gravity is the force that controls the motions of planets, as well as that of stars and galaxies. Even light, known to be the fastest thing in existence, cannot avoid the influence of gravity.

Now, physicists continue to work toward expanding on Einstein’s important ideas to resolve the question of gravity in a way that also operates harmoniously with our understanding of quantum mechanics. A quantum gravity theory would be substantial to scientists because it would not only unify our macroscopic and subatomic viewpoints of reality but would also potentially allow gravity to be incorporated mathematically along with the other three crucial interactions into a long-sought “theory of everything” the likes of which physicists nowadays dream of formulating.

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Alice is the Chief Editor with relevant experience of three years, Alice has founded Galaxy Reporters. She has a keen interest in the field of science. She is the pillar behind the in-depth coverages of Science news. She has written several papers and high-level documentation.


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