Scientists mapping the human body at the cellular level keep running into the same surprise: beneath the apparent chaos of tissues and organs, there is a hidden order that looks a lot like pure ...

Leonardo da Vinci’s sketch of a tree illustrates the principle that combined thickness is preserved at different stages of ramification. The math that describes the branching pattern of trees in ...

American Journal of Botany, Vol. 69, No. 4 (Apr., 1982), pp. 638-640 (3 pages) Branching patterns of leader shoots and lower branches were compared in 15 sugar maple trees. The number of first-order ...