Those Crazy Monkeys...

I'm not sure whether I'm talking about humans or chimps in this title.
#401 of This American Life, the Parent Trap edition, steals a solid second half from RadioLab. Its a story that's worth re-broadcasting, because how could you help yourself from listening to radio like this?
RadioLab tells the story of Lucy Temerlin, the daughter of a psychotherapist named Maurice K. Temerlin. When I say daughter, I mean adopted chimp-baby. Little Lucy, it seems, takes surprisingly well to the role--learning easily to use a knife and fork, communicate through sign language, comfort her mum, and, even go boy-crazy.
Of course this sweet little experiment goes awry, but I won't give the ending away. You've got to listen yourself.
And check out these great photos put together by RadioLab: http://vimeo.com/9377513