Unlike what science fiction dictates, Parallel Worlds don't diverge too much from the main universe. The more a universe differs from the original, the greater the energy required to break the fabric of spacetime and reach, or observe it.
Judging from the fact that we ended up here so easily, there should only be up to one or two major differences—no more than that.
Currently, this parallel universe lacks Dark Energy, but without a doubt, something else has taken its place. Just for clarity, let's call it "White Energy."
Dark and White Energy serve the same function, filling the void of space like some infinitely expanding foam. But their fundamental composition is completely different.
Thus, when Dark Energy was replaced, our generators failed—unable to process the new energy source, just like how a diesel engine would break down if you tried to run it on gasoline.
"But this much of a difference is absurd..."
