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Skull of an adult female gorilla (Gorilla gorilla), the largest genus of primates now living, native to the tropical and subtropical forests of Central Africa. After chimpanzees they are the next closest relative of humans, their DNA being over 95% similar to that of Home sapiens. The gorilla's skull features large canine teeth, mostly used for display, as gorillas are mainly herbivorous, eating fruit, leaves and stems. (KEYSTONE/SCIENCE PHOTO LIBRARY/GRANT MUSEUM, UCL/SCIENCE PHOTO LIBRARY)