Einstein’s theory of special relativity, proposed in 1905, states that nothing in the universe can travel faster than the speed of light in a vacuum.
But researchers at the CERN lab near Geneva claim they have recorded neutrinos, a type of tiny particle, travelling faster than the barrier of 186,282 miles (299,792 kilometers) per second.
Faster-than-light communication is, by Einstein's theory of relativity, equivalent to time travel.
According to Einstein's theory of special relativity, what we measure as the speed of light in a vacuum is actually the fundamental physical constant c.
This means that all inertial observers, regardless of their relative velocity, will always measure zero-mass particles such as photons traveling at c in a vacuum.
This result means that measurements of time and velocity in different frames are no longer related simply by constant shifts, but are instead related by Poincaré transformations.
These transformations have important implications:
The relativistic momentum of a massive particle would increase with speed in such a way that at the speed of light an object would have infinite momentum.
To accelerate an object of non-zero rest mass to c would require infinite time with any finite acceleration, or infinite acceleration for a finite amount of time.
Either way, such acceleration requires infinite energy.
Some observers with sub-light relative motion will disagree about which occurs first of any two events that are separated by a space-like interval.
In other words, any travel that is faster-than-light will be seen as traveling backwards in time in some other, equally valid, frames of reference, or need to assume the speculative hypothesis of possible Lorentz violations at a presently unobserved scale (for instance the Planck scale).
Therefore any theory which permits "true" FTL also has to cope with time travel and all its associated paradoxes, or else to assume the Lorentz invariance to be a symmetry of thermodynamical statistical nature (hence a symmetry broken at some presently unobserved scale).
In special relativity the coordinate speed of light is only guaranteed to be c in an inertial frame, in a non-inertial frame the coordinate speed may be different than c; in general relativity no coordinate system on a large region of curved spacetime is "inertial", so it's permissible to use a global coordinate system where objects travel faster than c, but in the local neighborhood of any point in curved spacetime we can define a "local inertial frame" and the local speed of light will be c in this frame, with massive objects moving through this local neighborhood always having a speed less than c in the local inertial frame.
In the last few hours of this breaking news coming to my attention I have also found that not only can neutrinos travel faster the the speed of light, but also ignorance is right up there with them.
Peace out yall THE BAGSTAXXX