As the saying goes, master math, physics, and chemistry, and you can travel the world without fear.
To be honest, although Gu Yang possessed a photographic memory, he had always been busy with knowledge regarding firearms, ammunition, and various tactical matters. He really didn't know much about such bizarre trivia—for instance, the fact that a horse's electrical resistance is actually stronger than a human's.
However, after a brief, superficial search into the reasons behind this, Gu Yang simply fell asleep.
Chapter 404