In the case of this very old tree, the included bark started forming perhaps more than a century ago and was not revealed until the branch union could no longer support the weight of the branch.

A wildlife photographer's unexpected discovery in Costa Rica reveals how a single tree branch, monitored for 432 day Tico Times COSTA RICA\'S LEADING ENGLISH LANGUAGE NEWSPAPER. Sign in ... I’ve ...

Leonardo da Vinci was wrong about trees. The multitalented, Renaissance genius wrote down his “rule of trees” over 500 years ago. It described the way he thought that trees branch.