A well-dressed Christmas tree is sure to steal the spotlight (well, that and all the presents stacked underneath it). A dry, needle-less tree, on the other hand, is an eyesore — and not to mention, a ...

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 ...

A large tree blocks a Palo Alto street after a wind storm. Courtesy Carol Hubenthal. Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in ...