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Diana monkeys have been observed to respond to the most likely reason for the call, typically a human or leopard, based on the situation and respond according to that. If they deem a leopard is the more likely predator in the vicinity they will produce their own leopard-specific alarm call but if they think it is a human, they will remain ...
Gua was a chimpanzee raised as though she were a human child by scientists Luella and Winthrop Kellogg alongside their infant son Donald. Gua was the first chimpanzee to be used in a cross-rearing study in the US. Gua was born on November 15, 1930, in Havana, Cuba.
He began in 1884 studying monkeys in American zoos and later travelled to Africa to study gorillas and chimpanzees. [6] He wrote frequently for popular journals and newspapers and ultimately had three books published on the subject, The Speech of Monkeys (1892), Gorillas & Chimpanzees (1896), and Apes and Monkeys: Their Life and Language (1900).
The authors conclude, "this study found evidence that humans can perform better than suggested by Matsuzawa in the limited-hold memory task. However, human performance is still below that of chimpanzees. This difference appears to stem from an inability to keep the location of symbols in working memory" [5]
The Old World species are divided into apes and monkeys depending on the number of cusps on their molars: monkeys have four, apes have five [72] - although humans may have four or five. [78] The main hominid molar cusp ( hypocone ) evolved in early primate history, while the cusp of the corresponding primitive lower molar (paraconid) was lost.
The great apes (Hominidae) show some cognitive and empathic abilities. Chimpanzees can make tools and use them to acquire foods and for social displays; they have mildly complex hunting strategies requiring cooperation, influence and rank; they are status conscious, manipulative and capable of deception; they can learn to use symbols and understand aspects of human language including some ...
The Naked Ape: A Zoologist's Study of the Human Animal is a 1967 book by English zoologist and ethologist Desmond Morris that looks at humans as a species and compares them to other animals. The Human Zoo , a follow-up book by Morris that examined the behaviour of people in cities, was published in 1969.
The stoned ape theory is a controversial hypothesis first proposed by American ethnobotanist and mystic Terence McKenna in his 1992 book Food of the Gods. [ 1 ] [ 2 ] The idea claims that the cognitive revolution was caused by the addition of psilocybin mushrooms , specifically the mushroom Psilocybe cubensis , into the human diet [ 3 ] around ...