Vavilov's centers of crop origin
1926Major
Nikolai Vavilov publishes his theory that crops arose in a few centers of high diversity. His expeditions build the world's largest seed collection in Leningrad.
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Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → Habitual fire and cooking → Homo sapiens appears → Complex language → Natufian villages → Oldest known bread → Agriculture begins → Irrigation → Uruk and the first cities → Cylinder seals → Writing (cuneiform) → Babylonian mathematics → Babylonian astronomical diaries → Thales and natural philosophy → Trial and death of Socrates → Plato's Academy → Aristotle's Lyceum → Alexander's conquests → Death of Alexander and the Hellenistic kingdoms → Seleucid Empire founded → Parthian Empire founded → Sasanian Empire → Crisis of the Third Century → Diocletian's Tetrarchy → Diocletian's Great Persecution → Edict of Milan → Constantinople founded → Roman Empire permanently divides → Visigoths sack Rome → Fall of the Western Roman Empire → Feudalism → Magna Carta → De Montfort's Parliament → Petition of Right → English Civil War → Execution of Charles I → Restoration of the English monarchy → Glorious Revolution → Locke's Two Treatises of Government → Adam Smith's Wealth of Nations → Malthus on population → Darwin's On the Origin of Species → Vavilov's centers of crop origin
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