You know what the futurists are always saying: Time cloaks are so cool but they're so complicated. And it's true! What were you expecting from a device that literally hides moments in time? A Northwestern mathematician has just shown, though, it doesn't have to be quite so hard after all.
Miguel Lerma just published a paper describing a new, simple kind of time cloak. Imagine you're looking at a clock. Without a time cloak, the hands move steadily on their appointed route, but with a cloak in place, it would appear to skip seconds or even minutes. Previous models for a time cloak create that jump by bending or expanding light around the cloaked event using lenses, though the first successful such time cloak created an event that lasted just 120 nanoseconds.