The remarkable discussions in this volume took place between Rudolf Steiner and workers at the Goetheanum, Switzerland. In this particular collection, Rudolf Steiner deals with topics ranging from elephants to Einstein. He discusses, among other things, ants and bees; shells and skeletons; animal and plant poisons - arsenic and lead; nutrition - proteins and fats, potatoes; the human eye and its colour; fresh and salt water; fish and bird migration; human clothing; opium and alcohol; thinking, and bodily secretions.