Thanks. I was aware of her studies there in Atlanta, and I've spent some time over at the Primate Center. You can find more info on her
webpage.
The really exciting thing for me was seeing the videos from the wild. In the video, the monkeys had a stone that had obviously (based on the amount of wear) been used for many, many decades at the least. It was used as the anvil. The stones used to break the nuts were carried from a riverbed over a mile away, and left on the anvil to be jointly used. Some of the hammer stones weighed as much as the monkey itself.
The monkeys also exhibited several other examples of both intellegence and cooperation. When the nuts were first harvested they would tear open one small hole in the end and drink the juice from inside (much as we do with coconuts). To determine which were ripe, the monkeys would tap on the nut and listen to the sound. Only ripe nuts were selected.
After they drank the juice they did not immediately try to crack the nut open. Instead they would remove all of the husk and set it aside and let it dry. Only dried, aged nuts were taken to the anvil. Often one monkey would help by placing the nut in a recess on the anvil while another used the stone as a hammer.
Aslan is not a Tame Lion