"That's correct, nothing but overgrown, untouched wilderness for the most part." Senku confirmed with a nod.

He let out a delighted snicker. "So I hear all the time. Due to the weight, we used paper to make our tank. It was reinforced with plastic, making a carbon fibre, which kept it strong and nearly impenetrable from spears, at least."

"The car we have now is a different, upgraded one for hauling steel, although Kaseki's he just uses to travel between what was once the Kingdom of Might and the Kingdom of Science. It's not too bad. Balloon's faster though."