Al and Kamaka, two old friends who are both in their 50s, are experiencing a whole new world. Part of what's novel: females. "Right off the bat, they were just enamored with the ladies in the group," ...

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Then, the chimp must select a rock of the proper size, shape and heft to use as the hammer. And finally, the chimp must be able to bring the rock down onto the nut in a way that will cause it to break ...

You are never too old to play — a maxim that even adult chimpanzees seem to follow. Young chimpanzees are already known to get many benefits from playing. But it seems to also be more important among ...

For wounded chimpanzees, help sometimes comes in the form of first aid — care rendered not by humans but by other chimps. New research reveals the nature and prevalence of these rarely witnessed ...

Long before COVID-19 forced most of the world behind masks and into isolation, viral diseases had been persistently jumping from humans to primate species, with drastic consequences. The problem ...