When you’re measuring fast changes in an atom, you’re talking zeptoseconds

If you’ve ever heard the word “zeptosecond,” chances are you’re either: (a) A kick-butt Scrabble player. (It has a 25-point value.) (b) A fan of the comic book character The Flash, and you like to argue about how fast he can really go. Otherwise, there hasn’t been all that much to say about the absurdly […]