Parallel universe

Time travel is created by science fiction writers. Then in the TV series “Lost”, a parallel universe was created. In more than one culture, people believe in spirits, ghost and after-life. I can’t say with any certainty whether any of

Inertia

Inertia is the resistance, of any physical object, to any change in its velocity. This includes changes to the object’s speed, or direction of motion. An object that is in its resting state takes extra effort before it will move.