"With me the horrid doubt always arises whether the convictions of man's mind which has been developed from the mind of the lower animals, are of any value or at all trustworthy." — Charles Darwin, Notebooks 1836–1844
I have loved and shared my life with animals since I was young. From the first birds I remember, to the elephant in the Düsseldorf Zoo who, when I called her name, trumpeted from across the sunken barrier and put her trunk to my face with the strength of an industrial vacuum cleaner, to our exceptionally intelligent and brave dog Marais who died last year but who still lives in my family's hearts, to our puppy Freyja: I have consistently been in awe of animals' other-than-human intelligence.