"Nope." Senku smirked a little bit. "I did the walking bit in the first six months. Can't live in the stone age forever, can we? Not if I'm going to save 7.8 billion people."

He blinked at the question, what kind of question is that? He brightened though, because it was that exhilarating. "Are you kidding? It's one of the biggest math and physics puzzles in existence! The sheer volume of calculations alone would be insanely complex, and on top of that, no one's ever managed to figure it out, but humanity's been looking into it for years. It would be incredibly amazing!"

Other dimensions would probably be cool, but wasn't that what they were doing here?

"In fact, knowing that information might be helpful in unraveling the puzzle of the train and the void."