1966 ⟶ Proposal of the Endosymbiotic Theory
Lynn Margulis proposed the endosymbiotic theory, that the eu...
Year
1809
1858
1965
1966
🌱 Lamarck Proposes Theory of Evolution
Lamarck proposed a modern theory of evolution based on the inheritance of acquired characteristics.⟶
BiologyEvolutionInheritance of Acquired CharacteristicsLamarckismJean-Baptiste Lamarck19th Century BiologyNatural HistoryEvolutionary Theory
France🐒 Darwin and Wallace independently propose theory of evolution by natural selection
Charles R. Darwin and Alfred Wallace independently proposed a theory of biological evolution ("descent through modification") by means of natural selection. Only in later editions of his works did Darwin used the term "evolution."⟶
EvolutionNatural SelectionCharles DarwinAlfred Russel WallaceBiology19th CenturyDescent with modification
United Kingdom🔬 Rudolf Virchow proposes cell theory: "Omnis cellula e cellula"
Rudolf Virchow proposed that cells can only arise from pre-existing cells; "Omnis cellula e celulla," all cell from cells. The Cell Theory states that all organisms are composed of cells (Schleiden and Schwann), and cells can only come from other cells (Virchow).⟶
Cell TheoryOmnis cellula e cellulaRudolf VirchowBiologyCytology19th CenturyCellular Biology
Germany🧬 Discovery of the Hayflick Limit
Leonard Hayflick: normal cells divide only a certain number of times: the Hayflick limit⟶
BiologyCell BiologyCell DivisionHayflick LimitLeonard HayflickAgingCellular Senescence1960s
United States🦠 Proposal of the Endosymbiotic Theory
Lynn Margulis proposed the endosymbiotic theory, that the eukaryotic cell is a symbiotic union of primitive prokaryotic cells. Richard Dawkins called the theory "one of the great achievements of twentieth-century evolutionary biology."⟶
BiologyEvolutionEndosymbiotic TheoryLynn MargulisEukaryotic CellsProkaryotic CellsCellular Biology1960s
United States