“A woman, who sold a monkey to the Zoological Society, believed to have come from Borneo (Macacus maurus or M. inornatus of Gray), said that it often cried; and Mr. Bartlett, as well as the keeper Mr. Sutton, have repeatedly seen it, when grieved, or even when much pitied, weeping so copiously that the tears rolled down its cheeks. There is, however, something strange about this case, for two specimens subsequently kept in the Gardens, and believed to be the same species, have never been seen to weep, though they were carefully observed by the keeper and myself when much distressed and loudly screaming.”
Charles Darwin (1872)
The expression of the emotions in man and animals
London: John Murray, pp.135-6
São famosos os relatos de elefantes que choram os seus mortos, de cães que ficam cegos de raiva ou de gatos felizes por se deitarem ao colo dos seus donos. Mas sentirão os animais o que nós pensamos que eles sentem? Qual a sua opinião sobre as emoções animais?