The Riddle of the Universe is the philosophical work of Ernst Haeckel, eminent biologist, in which he explores the meaning of life, the nature of reality, and the connection between physiology and thought. (Summary by A. Gramour)

The Riddle of the Universe is the philosophical work of Ernst Haeckel, eminent biologist, in which he explores the meaning of life, the nature of reality, and the connection between physiology and thought. (Summary by A. Gramour)