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 ...

What makes a tree a tree? Or rather, why can we recognize trees in even quite abstract depictions when they are so varied in nature? Researchers have found a clue in the branches, and used math to ...

That child’s drawing of a house, tree, or person may represent more than an element of the refrigerator-as-art-gallery. It may predict a child’s intelligence later in life. A child’s intelligence at ...