I have a friend who is 73 years old. He is a tailor. He also has a whole lotta energy. He loves walking far distances, travels a whole lot, and cuts down dying trees.
How To Make Changing Past Extremely impossible 1. Invent Time Machine. 2. Travel To 22nd Century. 3. Invent a machine that can change probability use it to make probability certain that changing past is Extremely impossible Forever.