Grandma death-her real name was Roberta Sparrow-wrote the book The philosophy of time travel. This book is only part of the director’s cut; the second edition of Donnie Darko. Here, several pages of the book are shown parallel to the events in the film in order to make the film easier to understand. The philosophy of time travel tells the exciting story of how to time travel and what basic elements that are important when travelling in time.
You need a portal or a wormhole so that you can be able to travel back or forth in time. Water and metal are the two main elements to travel in time. Water is the foundation element when forming time portals. These portals functions as gateways between universes. Metal is used when forming artifact vessels. Donnie’s mission is bringing the artifact (the jet engine) back before the tangent universe destroys itself. When the tangent universe is about to destroy itself, it will create a black hole. It’s capable of destroying all existence.
