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A male chimpanzee in a Swedish zoo planned hundreds of stone-throwing attacks on zoo visitors, according to researchers. Keepers at Furuvik Zoo found that the chimp collected and stored stones that he would later use as missiles. Further, the chimp learned to recognise how and when parts of his concrete enclosure could be pulled apart to fashion further projectiles. ... There has been scant evidence in previous research that animals can...

Chimpanzees have an extraordinary photographic memory that is far superior to ours.

Monkeys “imitate with a purpose”, matching their behaviour to others’ as a form of social learning, researchers have found. Such mimicry has previously been seen only in great apes – including humans and chimps – but now Italian researchers have recorded wonderful footage of the phenomenon in newborn rhesus macaques.

For the first time, chimpanzees have been seen using tools to chop up and reduce food into smaller bite-sized portions.

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.