eastern chimpanzee our closest living relatives chimpanzees bonobos' sex calls our closest living relatives chimpanzees our closest living relatives chimpanzees chimpanzees chimpanzees Our Closest Living Relative, the Chimp closest living relatives to humans common ancestor chimpanzees humanity's closest living relatives chimpanzees and humans chimpanzees chimpanzees legközelebbi rokonainknak closest evolutionary cousins chimpanzees and humans chimpanzees chimpanzees chimpanzees