The background on Monkeys in the Americas

When monkeys landed in South America 37 or more million years ago, the long-isolated continent already teemed with a menagerie of 30-foot snakes, giant armadillos and strange, hoofed mammals. Over time, the monkeys forged their own niches across the New World, evolved new forms and spread as far north as the Caribbean and as far south as Patagonia. Duke University evolutionary anthropologist Richard Kay applied decades’ worth of data on geology, ancient climates and evolutionary relationships to uncover several patterns in primate migration and evolution in the Americas. The analysis appears online this week in the journal Molecular Phylogenetics and Evolution.
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