http://blogs.scientificamerican.com/...s-declaration/

Naturally, they're only looking at brain structure, but still, it's really interesting. I've always known that animals have some degree of consciousness (some have little to no self-awareness, but the same can be said of most humans, so...). Even little mice, with a brain the size of a pea, have distinct personalities and likes and dislikes and preferences. How much more so an elephant or a dolphin or a horse or, yes, an octopus...