Four Colour Codes

Zane said goodbye to his classmates before checking for his shuttle booking. He still had about ten minutes. He took out a book from his inventory and started reading. 

The book was fascinating. It was written by a herbalist, Steven King a few years back.

Steven King was a cyclic theorist. He believed that all the plants and herbs that were being excavated from the dungeons and ruins had existed millions of years ago and had gone extinct. 

Zane was not a supporter of his thoughts. There was no evidence for that train of thought, for instance, not to mention that if indeed plants cycled back, what about animals, aren't they part of the natural cycle? 

Or was he trying to say animals such as the Stone Poison Stinger or the Ghoul General existed some million years ago as well? Wouldn't humanity's ancestors be nothing but chopping blocks to such ferocious animals that even stumped the awakened soldiers of this?