I had the idea of an element known as perpetuim or propetuim. It is an element created by having an element and an anti element and combining them through the manipulation of time. How would that work? Well in theory when using speed to travel throught time the object sent forward or backwards through a fourth dimentional plane would be able to exist in that plane until it came in contact with the matter it was made up of. Or it would result in a way that antimatter would when coming in contact with normal matter. Now propetuim is the opposite of antimatter. It is the positive version of an element.