I was thinking about this just today: I assume that the only reason we are better at uniquely identifying humans by their faces than at identifying other anima

I was thinking about this just today: I assume that the only reason we are better at uniquely identifying humans by their faces than at identifying other animals is that we either learn to do it or are so hard-wired by evolution: not because individual humans are more distinguishable than individuals of other species. So if that's true ... Google could just as easily introduce automatic face recognition for photos of your cats. Or your goat, or whatever. I see a whole new market here!