Chapter 338: The Sinister Cardinal Edwell

"I know, just like the Sun... The Sun can also burn in the vacuum of space!" Lydia hurriedly interjected. Lynn had mentioned this peculiar phenomenon during their astronomy class, but he hadn't explained the reason.

Lynn shook his head, amused. The light of the Sun didn't come from burning, but from nuclear fusion within the Sun, and light and heat were merely by-products.

Nevertheless, the example Lydia cited was quite apt for understanding, and Adela immediately grasped the concept. It wasn't that burning didn't require the element oxygen, but rather that other elements could be used as substitutes.

"So that's how it is."

In fact, he had conducted similar experiments before, but none of the dozen or so elements he used for the experiments could replace the role of oxygen, which led him to conclude that burning required oxygen.

But why could stones and metals also serve as fuel?