Fastest Particle
Although we just went on about how photons (i.e. light) are the fastest particles in the universe, scientists have been debating whether or not this is in fact true ever since Einstein came out with his theory. Although tachyons (hypothetical particles that move faster than light) have been proposed in the past, CERN has recently completed experiments where they found neutrinos that allegedly covered the distance between Geneva Switzerland and Gran Sasso, Italy, 60 nanoseconds faster than light would have. As of yet, however, they have refrained from drawing conclusions from the experiment, so the photon is still king.