Német
Ernst Haeckel war einer der bedeutendsten Biologen des 19. Jahrhunderts. In diesem Buch stellt er seine Gastraea-Theorie vor, die eine der ersten evolutionären Theorien zur Entwicklung der mehrzelligen Tiere war. Haeckel war ein Pionier der Evolutionstheorie und seine Theorien haben bis heute großen Einfluss auf die Biologie.
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