No really - right from the start we learn where those little rodents do come from. We also learn how smart they are. And I do believe rodents of any kind are way more clever than most think. After the mine finding rats (there's a documentary about that too), now we are onto the cleverness of guinea pigs.
I reckon if you ever had some as pets and you cared for them, you already know certain things, that scientists did find out through experiments and through testing here. Still it is fascinating seeing and hearing about what they are able to do. Small but quite the thinkers (or whatever you want to call them). I'm waiting for the documentary on bunnies now ... maybe it already exists ... and no offense to guinea pigs or rats ... but they are surely as clever ... at least! Ok I'm biased, still I want to see that.