- Creator Breakdown: Mortal ended up quitting on the story after receiving death threats from disgruntled fans. However, he did give it a very nice ending first.
- He Also Did: Nathanoraptor, author of The Ultimate Wildlife Sanctuary, is also a co-author of Prehistoric Earth.
- Series Hiatus: The Ultimate Wildlife Sanctuary has been put on hold so that Nathanoraptor can focus on Prehistoric Earth.
- Additionally, Mortal has put A New World on hold to work on an original story.
Trivia / Prehistoric Park Extinction World