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16/02/1834 German biologist Ernst Haeckel is born

He is known for his recapitulation theory claiming that an individual organism's biological development, or ontogeny, parallels and summarises its species' evolutionary development, or phylogeny. This theory is no longer accepted in biology, but is still very common. Haeckel invented many terms in biology like anthropogeny, ecology, phylum, phylogeny or stem cell.


  • Essentials 

  • Personal 

  • Research 

  • Polygenism and racial theory 

  • Embryology and recapitulation theory 

  • Publications 

  • Assessments of potential influence on Nazism