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Anatomical differences between Common and Pygmy Chimpanzees are slight, but in [[sex]]ual and social behavior there are marked differences. Common Chimpanzees have an [[omnivore|omnivorous]] [[diet (nutrition)|diet]], a troop [[predation|hunting]] culture based on beta males led by an [[alpha male]], and highly complex social relationships. Bonobos, on the other hand, have a mostly [[herbivorous]] diet and an [[egalitarian]], [[matriarchal]], sexually receptive behavior. The exposed skin of the face, hands and feet varies from pink to very dark in both species, but is generally lighter in younger individuals, darkening as maturity is reached. Bonobos have longer arms and tend to walk upright more often than the Common Chimpanzee.{{fact}}

Anatomical differences between Common and Pygmy Chimpanzees are slight, but in [[sex]]ual and social behavior there are marked differences. Common Chimpanzees have an [[omnivore|omnivorous]] [[diet (nutrition)|diet]], a troop [[predation|hunting]] culture based on beta males led by an [[alpha male]], and highly complex social relationships. Bonobos, on the other hand, have a mostly [[herbivorous]] diet and an [[egalitarian]], [[matriarchal]], sexually receptive behavior. The exposed skin of the face, hands and feet varies from pink to very dark in both species, but is generally lighter in younger individuals, darkening as maturity is reached. Bonobos have longer arms and tend to walk upright more often than the Common Chimpanzee.{{fact}}

Among bonobos, females have low-key dominance, priority over eating and solidarity against male aggression. Bonobos use sex in all its permutations to alleviate tension or for appeasement; it’s casual and quick (average 13 seconds) and not necessarily driven by orgasm or reproduction. Anything that arouses the interest of more than one bonobo results in sexual contact. Unlike common chimps, bonobos often have sex face to face. Despite constant sexual activity, reproductive rates are similar to common chimps. Males stay near their mothers all their lives. High-ranking males are usually sons of important females.<ref>http://www.janegoodall.org/chimp_central/chimpanzees/</ref>  

Among bonobos, females have low-key dominance, priority over eating and solidarity against male aggression. Bonobos use sex in all its permutations to alleviate tension or for appeasement; it's casual and quick (average 13 seconds) and not necessarily driven by orgasm or reproduction. Anything that arouses the interest of more than one bonobo results in sexual contact. Unlike common chimps, bonobos often have sex face to face. Despite constant sexual activity, reproductive rates are similar to common chimps. Males stay near their mothers all their lives. High-ranking males are usually sons of important females.<ref>http://www.janegoodall.org/chimp_central/chimpanzees/</ref>  

==Chimp intelligence==

==Chimp intelligence==

Chimps can recognise themselves in a mirror, vocalise and show similar nonverbal communication patterns to humans. Young chimps laugh when playful or being tickled. They appear to express emotions. Individuals identify themselves with distinctive sounds. Chimpanzees don’t have the physiology for speech, but can learn some human language – Washoe learned over 800 ASL signs in the 1960s – though without [[grammar]], syntax or words with variable meaning. Some people compare the usage of ASL by chimpanzees to a [[parrot]] speaking due to both animals not really understanding what they are communicating.

Chimps can recognise themselves in a mirror, vocalise and show similar nonverbal communication patterns to humans. Young chimps laugh when playful or being tickled. They appear to express emotions. Individuals identify themselves with distinctive sounds. Chimpanzees don't have the physiology for speech, but can learn some human language – Washoe learned over 800 ASL signs in the 1960s – though without [[grammar]], syntax or words with variable meaning. Some people compare the usage of ASL by chimpanzees to a [[parrot]] speaking due to both animals not really understanding what they are communicating.

Chimp and human brain and CNS anatomy, blood composition and immune response are similar. Many behaviors are similar. However, chimps don’t share history, make long-term plans, or engage in group discussions. The brightest chimp is intellectually duller than a normal human. A form of neuropsin, a protein with a role in learning and memory, believed by evolutionists to have originated less than 5 million years ago, is expressed only in humans.

Chimp and human brain and CNS anatomy, blood composition and immune response are similar. Many behaviors are similar. However, chimps don't share history, make long-term plans, or engage in group discussions. The brightest chimp is intellectually duller than a normal human. A form of neuropsin, a protein with a role in learning and memory, believed by evolutionists to have originated less than 5 million years ago, is expressed only in humans.

In tests performed by scientists, chimpanzees were shown to not understand that a human needs to be facing the chimpanzees in order to see them. These results indicate that the intellectual chasm between chimpanzees and humans is larger than previously believed.

In tests performed by scientists, chimpanzees were shown to not understand that a human needs to be facing the chimpanzees in order to see them. These results indicate that the intellectual chasm between chimpanzees and humans is larger than previously believed.