The answer, obviously, is really, really fast. Here, Universe Today‘s Fraser Cain tells us exactly how fast, and gives us answers to a few other things you may have wondered about before. For instance ...

We know Earth’s rotation on a cosmic scale, but seeing it close up requires quantum mechanics. Interferometry is the use of light waves, sound, etc., to identify changes in matter or motion. New ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...