Chimps, like humans, inherit a significant amount of their intelligence from their parents.
When the musical taste of chimps was tested, researchers found the animals shun the steadily strong beats common in Western genres, but they're drawn to Indian ragas and traditional tunes from West Africa.
We finally know a bit more about why chimps will chip in together on large tasks.
There's a group of people who've gone to court, trying to give a captive chimpanzee many of the same rights as human beings, posing some very interesting arguments. Trace explains their case.