As the sense of smell is so intimately connected with that of taste, it is not surprising that an excessively bad odour should excite wretching or vomitting in some persons.
Charles DarwinBesides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.
Charles DarwinOn seeing the marsupials in Australia for the first time and comparing them to placental mammals: “An unbeliever . . . might exclaim 'Surely two distinct Creators must have been at work'”
Charles DarwinSuch simple instincts as bees making a beehive could be sufficient to overthrow my whole theory.
Charles Darwin