A fascinating bit of science that seems to bear out what the church has always taught: what distinguishes humans from the rest of creation is their moral sense, their free will to choose to do good or evil:
I see this in my dog. Dogs know what you want them to do or don't want them to do; but this is not ethics. It is obedience. If you wanted them to rip out your neighbour's throat and eat him, it would probably be all the same to them.
With thanks to Eugene Craig Campbell for the link.