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.
An ear is a biological structure that receives sound waves and transmits them to the brain, which is a complex process that involves the interaction between the ear and the body.
External reference — all senses of the word “ear” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.