Chimpanzees, top right: Corbis / ​ Punchstock / ​ Getty Images; lower left and right: SuperStock RF / ​ SuperStock; Jane Goodall: © Martin Engelmann / ​ age fotostock
Шимпанза, горе десно: Corbis / Punchstock / Getty Images, подолу, лево и десно: SuperStock RF / SuperStock3; Џејн Гудал: © Martin Engelmann / age fotostock