An incredible concept...but " four years after they were first proposed, scientists have managed to add a fourth dimension - the movement of time - to a crystal for the first time, giving it the ability to act as a kind of perpetual 'time-keeper'."  The concept is explained in the linked article, as well as here:  http://www.sciencealert.com/physicists-just-created-the-world-s-first-time-crystal   "They did this by chaining together a line of ytter...