PhysicsMost precise clock to watch tiniest ever time dilations Slivers of time hundreds of trillions of times smaller than a second can now be clocked – so we can see if an object ages differently to another just below it ¿ìè¶ÌÊÓÆµ
PhysicsFirst real time-travel movies are loopers Hollywood has played with time travel for decades, but now physicists have the first movies of what travelling to the past actually looks like ¿ìè¶ÌÊÓÆµ