In most forests, a visitor’s eye is trained on what can be reached. The trunk can be measured. The leaves can be plucked. A specimen can be pressed, labeled, and filed away. Yet the largest share of ...

When I first traveled to the Amazon in the 1970s, the world was a different place. Most people thought of the rainforest, if they thought of it at all, as a green hell to be avoided at all costs. Soon ...