“
A bonobo is physically as different from a chimpanzee as a Concorde is from a Boeing 747. Even chimps would have to admit that the bonobo has more style. A bonobo’s body is graceful and elegant, with piano-player hands and a relatively small head. The bonobo has a flatter, more open face with a higher forehead than the chimpanzee. A bonobo’s face is black, its lips are pink, its ears small, and its nostrils wide. Females have breasts; they are not as prominent as in our species, but definitely A-cup compared to the flat-chested other apes. Topping it all off is the bonobo’s trademark hairstyle: long black hair neatly parted in the middle.
The biggest difference between the two apes is body proportion. Chimps have large heads, thick necks, and broad shoulders, they look as if they work out in the gym every day. Bonobos have a more intellectual appearance, with slim upper bodies, narrow shoulders, and thin necks. A lot of their weight is in their legs, which are longer than a chimp’s. The result is that when knuckle-walking on all fours, the chimp’s back slopes down from powerful shoulders, whereas the bonobo’s remains fairly horizontal because of its elevated hips. When standing or walking upright, a bonobo seems to straighten its back better than a chimp, giving the bonobo an eerily humanlike posture. For this reason, bonobos have been compared to Lucy, our Australopithecus ancestor.
”
”
Frans de Waal (Our Inner Ape: A Leading Primatologist Explains Why We Are Who We Are)