Bonobos rival chimps at the art of cracking oil palm nuts
![Bonobos cracking nuts with rocks](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/09/090216_bb_ticker_bonobos_free.jpg?fit=860%2C460&ssl=1)
CRACKING UP Bonobos in an African sanctuary use stones to crack oil palm nuts surprisingly well, researchers say. These apes hold nut-cracking stones in 15 different ways, and use 10 hand grips not previously described for tool-using chimps or monkeys.
Both: J. Neufuss