Does quantum tunneling count as faster than light travel? Or is there a space change and therefore time is unmodified. Is this proof that time and space are separable?
If faster than light is possible, what are the major changes to physics as we know it today?
Quantum tunneling does not count. It is a phase velocity at which nothing actually travels.
If faster than light is possible, what are the major changes to physics as we know it today?
There are 2 reasons why traveling faster than light is impossible.
1 - Albert Einstein said that if an object travels with the speed light the matter of its particles will turn to energy.
2 - The higher the velocity of something the more energy it needs to increase its speed (for example, for a body traveling 60% the speed of light to get to 70% the speed of light it will need more energy than for a body traveling 50% the speed of light to get to 60% the speed of light) so what scientists found out is that for a body to travel with the speed of light it will need infinite energy.
