One of the world’s largest wetlands, the Florida Everglades, is threatened by development. It provides South Florida’s water supply, and it’s also a refuge for numerous endangered species of plants and animals. As part of an effort to restore the everglades, biologists have tripled the population of the Florida panther. Biologists say the panthers’ health reflects the area’s environmental health. Scientists say the news so far is encouraging. Lorne Matalon prepared this report and photo gallery.