Einstein's theory gave shape to the models of the universe that we use today in modern science. He based his entire theory on the thought that nothing could exceed the speed of light (not even gravity) and that every force is restrained by this cosmic speed-limit. However, there is an element of quantum theory that suggests he may be wrong.
A "tachyon" is defined as:
"a putative class of particles which able to travel faster than the speed of light. Tachyons were first proposed by physicist Arnold Sommerfeld, and named by Gerald Feinberg. The word tachyon derives from the Greek (tachus), meaning "speedy." Tachyons have the strange properties that, when they lose energy, they gain speed. Consequently, when tachyons gain energy, they slow down. The slowest speed possible for tachyons is the speed of light.
Tachyons appear to violate causality (the so-called causality problem), since they could be sent to the past under the assumption that the principle of special relativity is a true law of nature, thus generating a real unavoidable time paradox (Maiorino and Rodrigues 1999). Therefore, it seems unavoidable that if tachyons exist, the principle of special relativity must be false, and there exists a unique time order for all observers in the universe independent of their state of motion."
It is interesting that they used the term "putative" to describe tachyons. By definition putative means: commonly put forth or accepted as true on inconclusive grounds. Defined by http://wordnetweb.princeton.edu/perl/webwn?s=putative
So between Einstein's theory based on the law that nothing can travel faster than the speed of light, and the existence of particles that travel no slower than the speed of light (that we acknowledge as existing but cannot prove) we may just be sitting on the verge of having to restructure our concepts and understandings of the surrounding forces in our universe.
The following is a link with further information about tachyons and their implementations:
Some even believe it holds the key to understanding the human aura, connecting with our creators and enabling us to heal ourselves through divine power. This is all new information to me, but I figured it might have some role in helping us understand (I am not sure how much of this information is scientifically proven, but then again it is impossible to prove that something doesn't exist)