but then finally, one of them — i named him david greybeard — and he accepted me better than the others forfish for termites. that was the turning point. that was when leakey was able to bring in the national geographic and send a photographer and filmmaker. and so gradually i was able to get to know the chimpanzees as individuals, each with their own personality. i could see their minds working to solve simple problems. and i could witness their emotions, like happiness, sadness, fear, grief. and all of this, when i was sent by leakey to cambridge university to do a phd in ethology — this is when the professors told me i had done everything wrong. yes, naming the chimps isn't scientific and i shouldn't talk about them having personalities, minds or emotions, because those, they said, were unique to humans. but even though i was nervous, never having been to college, i had been taught by a wonderful teacher as a child that this wasn't true, that in this respect, these erudite professors were wrong. and that teacher is right here behind me — i hope you can see him — it is my dog rusty. a