In This Collection, Rudolf Steiner discusses Lemuria and Atlantis, Chinese and Indian cultures, raw food, vegetarianism, children's nutrition, manure and soil, hardening of the arteries, the sense of smell, planetary influences, weather and its causes, creation of the world, origin of the human being, Saturn, Sun, and Moon, Darwinism, earth strata and fossils, Biela's comet, evolution of human culture, lightning, and volcanoes.