• Frans de Waal: Moral behavior in animals (Ted talk) https://www.youtube.com/watch?v=GcJxRqTs5nk 35 comments 6/5/2016 philosophy
• Frans de Waal: Moral behavior in animals [TED Talk] http://www.ted.com/talks/frans_de_waal_do_animals_have_morals 63 comments 29/11/2014 philosophy