I've been reading the Culture series by Ian M. Banks (RIP) recently and have been fascinated by the idea of an underlying energy grid between universes, and how

I've been reading the Culture series by Ian M. Banks (RIP) recently and have been fascinated by the idea of an underlying energy grid between universes, and how that is used to power spacecraft moving at 1000x multiples of the speed of light. What is even more interesting is how the ideas of scifi from decades ago - considered outrageous at the time - are now coming true. The possibilities of even near-light-speed are endless, much less actually being able to exceed it.