0 a small, very intelligent African ape with black or brown fur --
1 an African ape (= animal related to monkeys) with black or brown fur --
The characteristics of laughter in chimpanzees point to a critical constraint on the evolution of speech and language in the great apes.
The essential point is that humans share quite a similar memory process with chimpanzees.
Thus, when known, the learning of cultural behaviour can be very similar in humans and chimpanzees.
In contrast to arboreal monkeys, a high percentage of chimpanzee and gorilla defecations contain seeds.
Unlike the chopped exhalations of human laughter, chimpanzee utterances have only one sound produced per inward and outward breath.
This commentary heartily endorses that position with examples of methods and results found in sign language studies of cross-fostered chimpanzees.
With respect to faecal clumps that contained whole seeds, chimpanzees and gorillas passed 1.7 species of seed per defecation on average.
In each case further along in the spectrum, one more human gene is inserted while the corresponding chimpanzee gene is deleted, if necessary.
