Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
When an experience breaks a pattern that an organism has come to expect, it can be considered strange, as it deviates from the familiar and the known, and is therefore unusual and surprising.
External reference — all senses of the word “strange” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.