The experiments centered on the movement of highly charged packets of light called microwave photons. These photons were moved through two prisms which were eventually separated.
While most of the photons bounced off the first prism they hit, a few were able to get through because of quantum tunneling, an event where particles are charged to the point that it can penetrate an obstacle or barrier.
These rogue packets of light had to travel farther than those that were bounced of the prism to get to the machine collecting the data. Theoretically, one should arrive before the other; however, all the packets arrived at the same time. This indicates a discrepancy in speed between both the reflected and tunneling packets, thus leading the scientists to believe that the latter was actually moving faster than the speed of light.
If this experiment can be reproduced and confirmed, then it could change the laws of Physics as we know it considering a lot of the theories have been based on the assumption that the light speed "barrier" cannot be surpassed.
Source: Click me