Researchers found a hidden mathematical rule in tree-like art. Branch thickness follows a predictable ratio, making trees recognizable.

Yet only “Gray Tree” has scale-invariant branch diameters. When Mondrian removes the scale invariance in “Blooming Apple Tree ...

And winter is a good time to do it. Without leaves it is easier to see the tree’s structure and the condition and health and growth pattern of its branches to better assess which ones to keep ...