This is probably a bit out of place here, but I don't think humans are actually smarter than chimps to a surprising extent. Humans have language and (presumably) related capacity for various kinds of symbol manipulation, which are very powerful tools, and all sorts of powerful cultural tools built on top of that, but other than that I don't think humans are so terribly much smarter than chimps, not much more so than chimps are smarter than dogs or dogs smarter than cows at least.