Guanica Forest is a tropical dry forest in the southwest corner of Puerto Rico. In 1981, the United Nations recognized it for being one of the best examples of a dry tropical forest. The scientists in this study wanted to know how Guanica Forest and the land around it has changed over the years. Note: In earlier Natural Inquirer articles like this one, the Discussion section is called “Implications.” Topics: Wilderness, Wildlife, Biomes, Climate, Conservation, Dry Forest, Invasive, Land Use.