> So, where the structure of regular crystals repeats in space, in time crystals it repeats in space and time. Does that mean anything that behaves like a wave

> So, where the structure of regular crystals repeats in space, in time crystals it repeats in space and time. Does that mean anything that behaves like a wave is a form of time crystal? For example ocean currents moving in unison causes all atoms in that wave to follow a very specific pattern similar to what is described in the article.