In this Oct. 14, 2013 photo, a broad-snouted caiman swims in a water channel in the affluent Recreio dos Bandeirantes suburb of Rio de Janeiro, Brazil. With two decades of anarchic growth decimating natural habitats, the hardy caimans have become an increasingly common sight in the urban heart of western Rio, drawn in part by the scraps tossed to them by humans. (Photo by Felipe Dana/AP Photo)
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