Patterns refer to events, objects or things that repeat over and over. They reflect the past and predict the future, and can be cyclical or change over time. Patterns help humans organize information and were important for survival, as seen in animal migrations and tracks. Civilizations like Mesopotamia, Babylon, Egypt, China, and Greece incorporated patterns into their architecture. Humans enjoy finding patterns to understand what is happening, and patterns exist throughout nature as well as in art, music, and man-made structures.