Is-Ought violation - http://en.wikip​edia.org/wiki/I​s%E2%80%93ought​_problem - science won't tell you whether there's a "significant" difference between humans other non-human animals - there are a great many differences, whether you find them 'significant' or not in some moral sense is a subjective matter. Science is a discourse about facts, not values.Out of curiousity, what do you count as a 'higher' animal?