I haven't had the chance to fully read it over yet, but there's a new paper in PLoS about chimpanzees sharing foods raided from local farmers, the behavior potentially showing some parallels with meat-sharing behaviors seen in other populations of chimpanzees. I'll soon write something a little more detailed, but I will say that I think the paper is a little out of order (materials and methods should come before the results and discussion/conclusion). Likewise, be sure to look at some of the criticisms and caveats introduced by other primate researchers in the comments section, especially about how what the chimpanzees may or may not understand about their crop raids.
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Guest post by Brian Hare, Evolutionary Anthropologist at Duke University
The story of 'How we know where HIV-1 came from' is really cool-- A group of researchers went into the jungles of Africa, collected lots of monkey poop, and figured out pretty much the exact colony of chimpanzees that
I know that a bunch of other people covered this story, but I managed to find a video of it so I thought I would post it anyway.