By Matt Walker
Panzee the chimpanzee undertakes a liquid test
Chimpanzees are intelligent enough to appreciate how big a pint of liquid is, or the volume of any other measure. That shows they have an ability to gauge the difference between continuous quantities, such as a pint or half pint of non-alcoholic fruit juice. Previously, apes have only been known to differentiate discrete quantities, such as eight sweets over five. That means chimps are more intelligent than we thought, and shows they have a basic grasp of the physics of liquids. Details of the discovery are published in the journal Animal Cognition.
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