Physicists Tackle Our Favorite Science Fictional Debate

This debate comes up every time I watch a time travel movie: Is the timeline fixed, or is it constantly changing depending on what we do? Turns out that this is also an argument among physicists, some of whom believe the passage of time is illusion — while others view it as very real, and changing all the time. » 12/31/14 3:27pm 12/31/14 3:27pm

A Clock So Precise That It Detects Tiny Shifts In The Flow Of Time

In a basement lab at the University of Colorado Boulder, researchers have built the world's most accurate atomic clock — it can keep perfect time for 5 billion years. But the clock is so precise that it's run into a problem. Time doesn't move at the same rate everywhere in the cosmos, or even on the surface of Earth. » 11/05/14 7:40am 11/05/14 7:40am