Everything in the universe is traveling through space-time at the speed of light - the maximum speed possible. If you are sitting still in space, then you are traveling through time at the maximum speed. But if you begin traveling through space, then your progress through time slows down. E = mc2 is a very fundamental statement about the idea of what mass is, and that mass can be equivalent to energy. In addition to how to actually convert mass into energy. (Source: The Cassiopeia Project)