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.
The child, having emerged from the process of birth within a family unit, is characterized by a developing body and a growing sense of identity, and is in a stage of development where it has not yet begun to walk or talk, marking it as a very young child.
External reference — all senses of the word “baby” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.