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 nature also holds for trees depicted in art—and may even underlie ...

We don't think we've ever got through a festive period without drawing a Christmas tree, but what if you want to know how to draw a Christmas tree for a stylish, professional result that will look ...

It appears he was set for an approved-by-Michaels sketch in which the business mogul would be dressed up like a tree while standing next to Shel Silverstein’s titular Giving Tree, who offers up ...