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For the last decade, herpetologist Robert Drewes has documented the biodiversity of São Tomé and Príncipe, two remote islands off the west coast of Africa. These islands are unique for the number of species that live there and only there—many exist nowhere else in the world. For over 40 years, Drewes has researched the evolutionary relationships, biogeography, behavior, and natural history of African reptiles and amphibians. In all, he has traveled to over 30 African countries, where he seeks undescribed new species and tries to discover who is related to whom, and how they got there in the first place.