Humans — who enslave, castrate, experiment on, and fillet other animals — have had an understandable penchant for pretending animals do not feel pain. A sharp distinction between humans and “animals” is essential if we are to bend them to our will, wear them, eat them — without any disquieting tinges of guilt or regret. –


Carl Sagan, astronomer and author (1934-1996) & Ann Druyan, author (1949- ) [Shadows of Forgotten Ancestors, 1993]