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.
Giggling produces a series of short high-pitched sounds as a result of the physical properties of sound, which requires the presence of matter and wave.
External reference — all senses of the word “Giggle” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.
Trace. Question. Emerge.