Faster-than-light travel possible, maybe
Good news: it might be possible to travel faster-than-light! The bad news? Moving a cube that is just 10 meters on a side would take as much energy as would be gained if all of Jupiter’s mass (1.8986×10^27 kg) were converted into energy. That is a lot of energy and, as one scientist who is working on this idea put it, “We are still a very long ways off before we could create something to harness that type of energy.”
As I understand it, the theory, described in this news story, involves not moving an object through space, but manipulating space itself through the use of dark energy, which makes up about 74% of the universe’s mass-energy. This would involve similar processes as were at work in the early universe, just after the Big Bang, when space expanded faster than light, which, incidentally, moves 299,792,458 meters per second.