Time crystals are neat! A normal crystal is one that has a definite repeating pattern in space. A time crystal is similar, but instead of repeating in space, it

Time crystals are neat! A normal crystal is one that has a definite repeating pattern in space. A time crystal is similar, but instead of repeating in space, it repeats in time. https://en.wikipedia.org/wiki/Time_crystal https://en.wikipedia.org/wiki/Time_crystal Here's a gratutious example thanks to ChatGPT: "Imagine a line of atoms that flip their spins periodically, creating a pattern that repeats not only in space (like the atoms are arranged in a regular grid) but also in time (like the atoms flip their spins at regular intervals). This repeating pattern in time, which occurs without continuously adding energy, is what makes time crystals so intriguing and different from other states of matter."