Same-sex sexual behavior observed in dozens of primate species, suggesting evolutionary origin

A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...
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New World monkeys the evolutionary odyssey Alfred L. Rosenberger

Cover -- Contents -- List of Illustrations -- Preface -- CHAPTER 1. What Is a New World Monkey? -- What is a monkey? -- What is a platyrrhine? -- Platyrrhines and catarrhines -- Platyrrhine taxonomy - ...