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

For years, the Jensens have been puzzled by a huge nature mural in their home near the Minnesota State Fairgrounds.

16 Dog Outline Icons. A vector silhouette illustration of multiple images of the freindship between a cat and dog either playing or posing together. Pet Line Icons. Editable Stroke. Pixel Perfect. For ...