Are crystals possible in time, as well as in space? Undoubtedly the most outlandish, and beautiful story in this week's science press was the pre-publication of two new papers by MIT's Nobel Prize–winning physicist, Frank Wilczek, which suggests that they are. Wilczek postulates that if crystals exist in spatial dimensions, then they should exist in the dimension of time too. A time crystal is the temporal equivalent of an everyday crystal, in which atoms occupy positions that repeat…
15
