Here is one way to prove that light speed is not the fastest velocity that is obtainable by a particle or even humans.
Most physicists and physics tend agree with Einstein that light speed or the velocity of the photon is the fastest velocity obtainable and that there is nothing that can travel faster. But what the scientists usually forget is that a light photon is created within the center of sun and does not come from any other source other than a sun.
Since gravity pulls on objects in space in order for the light photon to escape the suns gravity a stronger gravitational force would need to be present in order to pull the light photon out and away from the sun over millions of years.
Such a force would be micro black holes that are located all over the Universe. Since light photons are created at the center of a sun that also creates a black hole when the sun has used all of its energy up there is an interesting effect taking place that is often times overlooked in the process of light speed.
First off we know that when a sun collapses it forms a black hole where large amounts of gravitational forces then spread out across an area of space consuming everything in its path including light photons. The thing is the center of the black hole is present within the the center of the sun and is the inside of the suns processes turned inside out. So the process that we see in a black hole are actually taking place within the center of a sun but opposite of the effects of the blackhole.
This would lead me to believe that a certain percentage of the sun's core is acting like a black hole but in reverse. Meaning that instead of pulling particles into the center of the sun the reverse operation of the black hole would actually be pushing particle matter away from the center of the sun at light speed velocity. This would occur most likely at the Quantum level where the gravitational field of the black hole within the sun forces the light photon out of the sun over millions of years. But why does it take millions of years for the light photon to escape the sun? Most likely because of small Quantum Strings attached to the black hole at the center of the sun fluxing in an out of normal space time. These Quantum Strings create barriers that the light photon bounces off of possibly creating small amounts of thermal energy due to the collision.
Once the photon has been able to escape the sun the reverse gravitational effect of the inverted black hole expels the light photon at the speed of light out into the Universe that coupled with the gravitational force of other suns, black holes and micro black holes keeps the light photon traveling for many millions of years until its wavelength is stretched to the point of dissipating like smoke in a strong breeze.
Such gravity would not have been present prior to the Big Bang because suns had not yet formed to create the velocity of lighpoint of collision is where the center of our Universe would have been created. As the explosion cascaded outwards t speed based upon the sun/black hole inverted theory above.
Before the Big Bang Quantum particles would have been careening throughout the Universe in all directions and would have been most likely traveling around 10,000 X the speed of light if not faster. Then there would had to have been a moment when two or more Quantum collided together.
The resulting collision released an immense amount of energy. At the greatest point of collision is where the center of our Universe and other Universes would have got their start from. As the central explosion cascaded outwards the extreme amount of energy could have caused other smaller Quantum pockets to spontaneously combust because of the galaxies in our Universe you will not find any rocky planets just suns where the greatest amount fo heat and pressure would pressure and heat placed upon them. This would theoretically be true because at the center of our Universe and all have been present. As the initial shockwave spread spread throughout our Universe it would have ignited such pockets with larger galactic centers being closer to the Universe core where smaller galactic centers would have been created farther away from the initial explosion to the point where matter that was expelled was able to cool and form in to planets such as Earth.
The same process could have occurred within each Solar System as well where after the primary explosion triggered the galactic explosions to occur the galactic explosions would have triggered solar system sized sun Quantum to erupt. The smaller the Quantum explosion that occured meant that more debris that would form into solid chunks and later planets would be present.
This theory could possibly be true because if the Universe did not evolve in the manner stated above then all of the planets and suns would have been pulled into an orbit around the center of our Universe the same as the planets orbit around the sun of our solar system except that all of the galactic centers would have revolved around the center of the Universe without forming galaxies around them.
Basically Einsteins theory of a light photon being the fastest possible velocity is incorrect for the simple fact that prior to the Big Bang there would not have been any light which comes from a sun because the suns of the Universe had not been created yet. In order for the Big Bang to occur Quantum particles would have to have collided at faster than light speed velocities because gravity was not present. Maybe even on the magnitude of 100 suns collapsing into a single black hole at once