Across dense forests, deep oceans, and remote mountain ranges, there are creatures so elusive that even scientists may go ...

Earth is home to millions of species, yet a handful now exist in such low numbers that biologists can name individual animals. Illegal trade and shifting ecosystems have pushed them to the brink.

Have you ever heard of or seen a kodkod, a galaxy frog, a dumbo octopus or an El Diablo treehopper? We didn’t just make up ...