1826 ⟶ Karl von Baer Discovers Mammalian Eggs in Ovaries
Karl von Baer showed that the eggs of mammals are in the ova...
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🥚 William Harvey's Conclusion on Animal Development
William Harvey concluded that all animals, including mammals, develop from eggs, and spontaneous generation of any animal from mud or excrement was an impossibility.⟶
BiologyEmbryologyWilliam HarveySpontaneous GenerationReproduction17th CenturyScientific RevolutionDevelopmentZoology
🔬 Lazzaro Spallanzani Disproves Spontaneous Generation and Studies Reproduction
Lazzaro Spallanzani again disproved spontaneous generation by showing that no organisms grow in a rich broth if it is first heated (to kill any organisms) and allowed to cool in a stoppered flask. He also showed that fertilization in mammals requires an egg and semen.⟶
BiologySpontaneous GenerationLazzaro SpallanzaniGerm TheoryReproduction18th CenturyFertilization
Italy🐛 Jean-Baptiste Lamarck Begins Study of Invertebrate Taxonomy
Jean-Baptiste Lamarck began the detailed study of invertebrate taxonomy.⟶
BiologyTaxonomyInvertebratesLamarckClassification19th CenturyZoology
France🥚 Sperm Discovered to be Agents of Fertilization
J. L. Prevost and J. B. Dumas showed that the sperm in semen were not parasites, as previously thought, but, instead, the agents of fertilization.⟶
BiologyReproductionFertilizationSpermJ. L. PrevostJ. B. Dumas19th Century BiologyEmbryologySexuality
France🥚 Karl von Baer Discovers Mammalian Eggs in Ovaries
Karl von Baer showed that the eggs of mammals are in the ovaries, ending a 200-year search for the mammalian egg.⟶
BiologyEmbryologyMammalian eggReproduction19th centuryOvariesZoology
Estonia🥚 Fusion of Sperm and Egg Observed in Rabbits
Martin Barry reported the fusion of a sperm and an egg for rabbits in a 1-page paper in the Philosophical Transactions of the Royal Society of London.⟶
BiologyReproductionFertilizationMartin BarryEmbryology19th CenturyCell Biology
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