In fact, general relativity cannot be proven or tested in any manner. It says that gravity works by bending spacetime. It is one of the more challenging ideas in science. If you ask General Relativity, the reply is a lot closer to the latter, as it isn't mass that determines gravitation, but instead the curvature of space, which is dependent on the sum of all of the matter and energy within it. You're using general relativity when you invoke the GPS system to discover your position on the planet's surface. Thus, special and general relativity actually cannot be tested in any manner.
Contrary to what most people think, science has its limitations, and we should know of them. It is a vital part of being human. It is all about improving ideas to get closer to the truth, and, in some cases, completely throwing out theories that have been proven wrong.
When there's something you can rely on physicists for, it's to keep a look out for an anomaly. Specifically, physicists have lately become excited about the notion that gravity is an emergent phenomenon. So they have invented a way to deal with infinities called renormalisation. By carefully controlling the shape and frequency of the lasers, they are able to create interference patterns that take on the shape of egg boxes. When many physicists are convinced by the presence of dark energy, others are looking for alternative explanations.
The occurrence of life is dependent upon the occurrence of the force of gravity. After all, the Universe could be expanding, but that's not the only thing which can lead to a redshift. The Universe itself, nevertheless, isn't static. Measure how it is expanding today and how it was expanding in the past, and you know exactly what the Universe must be made out of. If you wish to understand how fast the Universe is expanding, the easiest method goes all of the way back to Hubble himself.
If gravity doesn't exist, there's no Earth's atmosphere, it means there isn't any life at the Earth. Unfortunately, it cannot be quantized like the other interactions in the standard model. In a feeling, comparing gravity with different forces is useless. For Einstein, it is a part of inertia. Actually, it was not merely a force that any two bodies in universe attract each other, but gravity is the force due to the effects of well balanced universe. Quantum gravity in 1 dimension is very much enjoy a single particle interacting in numerous dimensions.
There isn't a crystal clear way in order for it to make physical sense. The point is that black holes have a means to store information that has so far been neglected. It is that what appears to be black, empty space is really not. The exact same idea holds for floating spaceships and so on. The key ideas of the theory of relativity are incredibly well-presented.
There's where the issue starting. The problems of general relativity arise when you consider the Universe at quite small or at huge scales. There is an issue, however. It is that we have no idea what dark energy is. Among the huge difficulties with quantum gravity is it generates infinities that don't have any physical meaning.
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