Nature delights in making use of the same forms in the most various biological connections: as it does, for instance, in the appearance of branch-like structures both in coral and in plants, and indeed in some forms of crystal and in certain chemical precipitates.
Sigmund Freud, James Strachey (2001). “Totem and Taboo: Some Points of Agreement Between the Mental Lives of Savages and Neurotics”, p.31, Psychology Press
