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""The Substance of the Riddle of the Universe"" is a philosophical and scientific work written by Ernst Haeckel, a German biologist, philosopher, and naturalist. The book explores the fundamental questions about the nature of the universe, the origin of life, and the meaning... Read Full Overview

""The Substance of the Riddle of the Universe"" is a philosophical and scientific work by Ernst Haeckel, a German biologist and philosopher. The book explores the fundamental questions about the nature of the universe, including the origin of life, the meaning of existence, and... Read Full Overview

The Substance of the Riddle of the Universe is a philosophical work by Ernst Haeckel that explores the fundamental questions of existence and the nature of reality. Haeckel was a prominent German biologist and philosopher who believed that science and philosophy were inextricably... Read Full Overview