From The Wall Street Journal:
Tree climbing is no longer kids’ stuff. With the right equipment and training, a killer view (and workout) can be yours.
“Rec” tree climbing has its heroes, like Peter “Treeman” Jenkins and his wife, Patty, who established Tree Climbers International, the activity’s primary organization. It has its Boswells, like the author Richard Preston, whose book “The Wild Trees”—an ascent into the world’s tallest trees—was a result of Mr. Preston’s own interest in climbing. It has its Einsteins, like Margaret Lowman, who pioneered the science of canopy research, and calls the vast realm of tree tops the “eighth continent.”