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This unique book explores the captivating colors that appear in the atmosphere of the earth: coronas, glories, halos, rainbows, dawn and dusk.
Explores the connections between materialist research on the atom and Rudolf Steiner's spiritual science.
Presents an integrated view of evolution as a dynamic process, based on the author's lifetime of biological research.
A comprehensive overview of the organs and systems of the human organism, viewed as a dynamic whole.
Shows that childhood is a necessary part of human evolution and compares the characteristics of human children to those of other juvenile primates.
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