Einstein's theory of special relativity sets of the speed of light, 186,000 miles per second (300 million meters per second). But some scientists are exploring the possibility that this cosmic speed limit changes.
In 2015, a team of Scottish scientists announced they had found a way to slow the speed of light. By sending photons through a special mask, the researchers altered their shape. In this malformed state, these infinitesimal particles of light traveled slower than normal photons.
The difference in speed was almost imperceptible, but the accomplishment itself was stunning! At 299,792,458 meters per second, the speed of light has stood as an unbreakable, unchangeable speed limit. No longer.
But why would anybody want to slow down the speed of light? After all, it's already slow enough!