Sentences with phrase «wild chimpanzees show»
«My observations from wild chimpanzees show that while unexpectedly encountering a snake or snake model may trigger a startle response, they often then investigate the snake, but do not necessarily show signs of fear,» Crockford said.
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Now, in a pair of studies, researchers show that chimpanzees will give up a treat in order to help out an unrelated chimp, and that chimps in the wild go out on risky patrols in order to protect even nonkin at home.
When Peter Parham's postdoc first showed him data suggesting a gene in some wild chimpanzees infected with the AIDS virus closely resembled one that protects humans from HIV, he was skeptical.
«Female chimpanzees don't fight for «queen bee» status: Study of social rank in wild chimps shows striking differences between the sexes.»
The tested chimpanzees successfully used the sticks, and moreover, spontaneously showed the same underlying action pattern (a scooping action of the stick) as their wild cousins do.
Human researchers are killing wild chimpanzees by inadvertently giving them colds, a new study shows for the first time.