I would guess that just like any physical trait, some emotions will be conserved by evolution and some will be unique. For example, emotions from the primitive

I would guess that just like any physical trait, some emotions will be conserved by evolution and some will be unique. For example, emotions from the primitive parts of our brain like fear may be conserve across much of the animal kingdom. Empathy, which I define as a shared emotional experience, may be uniquely primate (but the article seems to indicate otherwise?).