YearEvent
c. 13.7 billion years ago

Go to Big Bang in A Dictionary of Space Exploration (3 ed.)

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Go to atom in A Dictionary of Astronomy (2 rev ed.)

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c. 13 billion years ago

Go to cosmic abundance of elements in A Dictionary of Earth Sciences (3 ed.)

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c. 4.6 billion years ago

Go to Milky Way in A Dictionary of Space Exploration (3 ed.)

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Go to sun in A Dictionary of Physics (6 ed.)

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c. 4.5 billion years ago

Go to structure of the Earth in Visual English Dictionary (1 ed.)

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c. 4 billion years ago

Go to structure of the Earth in Visual English Dictionary (1 ed.)

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c. 3.5 billion years ago

Go to bacteria in World Encyclopedia (1 ed.)

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c. 3 billion years ago

Go to endosymbiont theory in A Dictionary of Biology (6 ed.)

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1 billion years ago

Go to Ediacaran fossils in A Dictionary of Earth Sciences (3 ed.)

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c. 500 million years ago

Go to Ordovician in A Dictionary of Earth Sciences (3 ed.)

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c. 400 million years ago

Go to Psilophytales in A Dictionary of Plant Sciences (2 ed.)

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c. 350 million years ago

Go to insects in The Oxford Companion to the Earth (1 ed.)

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c. 340 million years ago

Go to Amphibia in A Dictionary of Biology (6 ed.)

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c. 300 million years ago

Go to Reptilia in A Dictionary of Biology (6 ed.)

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c. 250 million years ago

Go to Pangaea in A Dictionary of Zoology (3 ed.)

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c. 225 million years ago

Go to dinosaur in World Encyclopedia (1 ed.)

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c. 200 million years ago

Go to continental drift in World Encyclopedia (1 ed.)

c. 170 million years ago

Go to mammal in World Encyclopedia (1 ed.)

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c. 150 million years ago

Go to Archaeopteryx in A Dictionary of Genetics (7 ed.)

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c. 125 million years ago

Go to Archaeopteryx in A Dictionary of Genetics (7 ed.)

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c. 65 million years ago

Go to dinosaur in World Encyclopedia (1 ed.)

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Go to mammal in World Encyclopedia (1 ed.)

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c. 50 million years ago

Go to Gondwanaland in The Oxford Companion to Australian History (1 rev ed.)

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c. 45 million years ago

Go to Primates in A Dictionary of Biology (6 ed.)

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c. 15 million years ago

Go to Simiiformes in A Dictionary of Zoology (3 ed.)

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c. 6 million years ago

Go to Paranthropus in A Dictionary of Zoology (3 ed.)

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c. 4.5 million years ago

Go to hominid in A Dictionary of Biology (6 ed.)

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c. 4.4 million years ago

Go to Ardi in New Oxford American Dictionary (3 ed.)

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c. 3.6 million years old

Go to Australopithecus in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 3.2 million years ago

Go to Australopithecine in A Dictionary of Genetics (7 ed.)

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c. 2.6 million to 14,000 years ago

Go to Palaeolithic in The Oxford Dictionary of Phrase and Fable (2 ed.)

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c. 2.6 to 1.2 million years ago

Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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Go to Paranthropus in A Dictionary of Zoology (3 ed.)

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c. 2.5 million years ago

Go to hominid in A Dictionary of Biology (6 ed.)

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c. 2.2 million years ago

Go to Homo in A Dictionary of Genetics (7 ed.)

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c. 2.2 to 1.4 million years ago

Go to Homo habilis in World Encyclopedia (1 ed.)

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c. 1.85 million years ago

Go to Homo habilis in World Encyclopedia (1 ed.)

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c. 1.8 million years ago

Go to Homo erectus in World Encyclopedia (1 ed.)

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c. 1.7 million years ago

Go to Ice Ages in World Encyclopedia (1 ed.)

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Go to Homo erectus in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1.6 million years ago

Go to Homo erectus in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 1 million years ago

Go to Speech in Magic Universe: A Grand Tour of Modern Science (1 ed.)

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c. 500,000 years ago

Go to Zhoukoudian in A Dictionary of World History (2 ed.)

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Go to Zhoukoudian, China in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 250,000 years ago

Go to spearhead in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 230,000 years ago

Go to Homo sapiens in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 150,000 years ago

Go to Homo sapiens in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 130,000 years ago

Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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c. 120,000 to 35,000 years ago

Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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c. 90,000 years ago

Go to Homo sapiens in The Concise Oxford Dictionary of Archaeology (2 ed.)

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77,000 years ago

Go to Speech in Magic Universe: A Grand Tour of Modern Science (1 ed.)

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c. 60,000 years ago

Go to Pacific Islands in The Oxford Companion to Archaeology (1 ed.)

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c. 50,000 to 30,000 years ago

Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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c. 45,000 years ago

Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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c. 35,000 years ago

Go to hunter‐gatherers in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Venus figurine in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Neanderthal man in A Dictionary of Biology (6 ed.)

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c. 35,000 to 14,000 years ago

Go to Palaeolithic in The Oxford Dictionary of Phrase and Fable (2 ed.)

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c. 31,000 years ago

Go to cave art in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 30,000 years ago

Go to Ice Ages in World Encyclopedia (1 ed.)

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Go to Bering land bridge in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to cave art in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 29,000 years ago

Go to marine and underwater archaeology in The Oxford Companion to Ships and the Sea (2 ed.)

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c. 27,000 years ago

Go to unenclosed settlement in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 25,000 years ago

Go to ‘Venus of Willendorf’ in The Oxford Dictionary of Art (3 ed.)

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Go to unenclosed settlement in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 24,000 years ago

Go to unenclosed settlement in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 23,000 years ago

Go to Mal'ta, Siberia, Russia in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 18,000 years ago

Go to cave art in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 16,000 years ago

Go to Lascaux, France in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 15,000 years ago

Go to Palaeo‐Indian in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Magdalenian in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Altamira in The Oxford Dictionary of Art (3 ed.)

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c. 14,000 to 10,000 years ago

Go to Mesolithic in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 12,000 years ago

Go to Mesolithic in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 8000 BCE

Go to Neolithic in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Ali Kosh, Iran in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Jarmo, Iraq in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Jericho in A Dictionary of World History (2 ed.)

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Go to spindle whorl in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Jomon in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Jomon in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 7000 BCE

Go to copper in The Concise Oxford Dictionary of Archaeology (2 ed.)

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c. 6500 BCE

Go to Neolithic in A Dictionary of World History (2 ed.)

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Go to Neolithic in A Dictionary of World History (2 ed.)

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Go to Khirokitia in The Grove Encyclopedia of Classical Art and Architecture (1 ed.)

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Go to Neolithic in A Dictionary of World History (2 ed.)

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c. 5800 BCE

Go to Neolithic in A Dictionary of World History (2 ed.)

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c. 5000 BCE

Go to Tehuacán Valley, Mexico in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Neolithic in A Dictionary of World History (2 ed.)

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c. 4400 BCE

Go to weaving in World Encyclopedia (1 ed.)

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3761 BCE

Go to Jewish in The Oxford Dictionary of Phrase and Fable (2 ed.)

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2781 BCE

Go to Sothic cycle in A Dictionary of Astronomy (2 rev ed.)

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c. 2500 BCE
c. 2000 BCE

Go to Knossos in The Oxford Dictionary of Phrase and Fable (2 ed.)

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Go to Disease in The Oxford Companion to Archaeology (1 ed.)

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c. 1750 BCE

Go to Scribes in The Oxford Encyclopedia of Ancient Egypt (1 ed.)

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Go to Babylonia in The Oxford Companion to Classical Literature (3 ed.)

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Go to place value notation in The Concise Oxford Dictionary of Mathematics (4 ed.)

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c. 1300 BCE

Go to Mycenaean civilization in World Encyclopedia (1 ed.)

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c. 1100 BCE

Go to Pole Star in World Encyclopedia (1 ed.)

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753 BCE

Go to calendar, Roman in The Oxford Classical Dictionary (3 rev ed.)

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585 BCE

Go to Thales of Miletus (fl. 585 bc) in The Oxford Dictionary of Philosophy (2 rev ed.)

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c. 570 BCE

Go to Anaximander (611–c.547 bc) in World Encyclopedia (1 ed.)

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c. 550 BCE

Go to zodiac in World Encyclopedia (1 ed.)

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Go to Sushruta in A-Z of Plastic Surgery (1 ed.)

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Go to Āyurveda in A Dictionary of Hinduism (1 ed.)

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c. 529 BCE

Go to Pythagoras (c.580–500 bc) in World Encyclopedia (1 ed.)

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c. 510 BCE

Go to Hecataeus in Oxford Dictionary of the Classical World (1 ed.)

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c. 500 BCE

Go to magnetite in A Dictionary of Chemistry (6 ed.)

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Go to amber in A Dictionary of Biology (6 ed.)

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c. 450 BCE

Go to Empedocles of Acragas (c.495–c.435 bc) in The Oxford Dictionary of Philosophy (2 rev ed.)

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Go to Philolāus in Oxford Dictionary of the Classical World (1 ed.)

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c. 420 BCE

Go to atomism in World Encyclopedia (1 ed.)

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c. 400 BCE

Go to Hippocrates in The Oxford Dictionary of Philosophy (2 rev ed.)

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c. 380 BCE

Go to four humours in The Oxford Dictionary of Philosophy (2 rev ed.)

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c. 350 BCE

Go to Eudoxus of Cnidus (c.400 bc–350 bc) in A Dictionary of Scientists (1 ed.)

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c. 330 BCE

Go to Aristotle (384–322 bc) in World Encyclopedia (1 ed.)

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c. 300 BCE

Go to Theophrastus (c. 372 bc–287 bc) in A Dictionary of Scientists (1 ed.)

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Go to Mafia [Crime] in The Oxford Dictionary of Reference and Allusion (3 ed.)

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Go to Epicureanism in World Encyclopedia (1 ed.)

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c. 280 BCE

Go to Herophilus in The Oxford Companion to Medicine (3 ed.)

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c. 270 BCE

Go to Aristarchus of Samos (c.320–c.250 bc) in A Dictionary of Astronomy (2 rev ed.)

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c. 250 BCE

Go to Archimedes' principle in A New Dictionary of Eponyms (1 ed.)

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Go to alchemy in A Dictionary of World History (2 ed.)

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Go to Berruguete, Alonso (c.1488–1561) in The Oxford Dictionary of the Renaissance (1 ed.)

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Go to Roman numeral in World Encyclopedia (1 ed.)

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c. 220 BCE

Go to Eratosthenes of Cyrene (275–195bc ) in The Concise Oxford Dictionary of Mathematics (4 ed.)

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c. 140 BCE

Go to Hipparchus of Nicaea (c.190–c.120 bc) in A Dictionary of Astronomy (2 rev ed.)

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c. 130 BCE

Go to precession of the equinoxes in A Dictionary of Astronomy (2 rev ed.)

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Go to Hipparchus of Nicaea (c.190–c.120 bc) in A Dictionary of Astronomy (2 rev ed.)

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129 BCE

Go to Hipparchus of Nicaea (c.190–c.120 bc) in A Dictionary of Astronomy (2 rev ed.)

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c. 100 BCE

Go to Acupuncture in The Concise Oxford Dictionary of World Religions (1 rev ed.)

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c. 50 BCE

Go to Maya in A Dictionary of World History (2 ed.)

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Go to Maya in A Dictionary of World History (2 ed.)

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45 BCE

Go to calendar, Roman in The Oxford Classical Dictionary (3 rev ed.)

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CE 1

Go to Anno Domini in The Oxford Dictionary of the Christian Church (3 rev ed.)

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c. 50

Go to Cornelius Celsus, Aulus in The Oxford Classical Dictionary (3 rev ed.)

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c. 150

Go to Ptolemy (130–75) in The Oxford Dictionary of Byzantium (1 ed.)

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158

Go to Galen (ad 129–199) in The Oxford Companion to Medicine (3 ed.)

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c. 800

Go to mathematics in World Encyclopedia (1 ed.)

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801

Go to Abbas I (1571–1629) in World Encyclopedia (1 ed.)

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921

Go to Jewish in The Oxford Dictionary of Phrase and Fable (2 ed.)

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c. 950

Go to Italy in The Oxford Companion to Medicine (3 ed.)

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c. 1000

Go to Cordoba in The Oxford Dictionary of Phrase and Fable (2 ed.)

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c. 1040

Go to gunpowder in World Encyclopedia (1 ed.)

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1054

Go to Crab Nebula in A Dictionary of Astronomy (2 rev ed.)

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1066

Go to Halley's Comet (1P/Halley) in A Dictionary of Astronomy (2 rev ed.)

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c. 1489
c. 1500

Go to Leonardo da Vinci (1452–1519) in World Encyclopedia (1 ed.)

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1530

Go to Brunfels, Otto (c.1489–1534) in The Oxford Dictionary of the Renaissance (1 ed.)

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1543

Go to Deep Space 1 in A Dictionary of Astronomy (2 rev ed.)

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1545

Go to Paré, Ambroise (c.1510–90) in The Oxford Companion to Military History (1 ed.)

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1560

Go to physic garden noun in Oxford Dictionary of English (3 ed.)

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c. 1576

Go to Brahe, Tycho (1546–1601) in World Encyclopedia (1 ed.)

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1582

Go to Gregorian calendar in The Concise Oxford Dictionary of the Christian Church (2 rev ed.)

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1596

Go to Brahe, Tycho (1546–1601) in World Encyclopedia (1 ed.)

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Go to Bauhin, Gaspard (1550–1624) in A Dictionary of Plant Sciences (2 ed.)

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1600

Go to magnetic pole in A Dictionary of Environment and Conservation (1 ed.)

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Go to Gilbert, William (1540–1613) in A Dictionary of Earth Sciences (3 ed.)

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1609

Go to Kepler, Johannes (1571–1630) in The Oxford Dictionary of Philosophy (2 rev ed.)

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1610

Go to Galileo Galilei (1564–1642) in A Dictionary of Physics (6 ed.)

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1613

Go to Galileo Galilei (1564–1642) in A Dictionary of Physics (6 ed.)

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1620

Go to Bacon, Francis (1561–1626) in The Concise Oxford Dictionary of the Christian Church (2 rev ed.)

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1628

Go to Harvey, William (1578–1657) in The Oxford Companion to British History (1 rev ed.)

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1632

Go to Galileo Galilei (1564–1642) in A Dictionary of Physics (6 ed.)

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1638

Go to Galileo Galilei (1564–1642) in A Dictionary of Physics (6 ed.)

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1646

Go to Pascal, Blaise (1623–1662) in A Dictionary of Scientists (1 ed.)

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1648

Go to Helmont, Jan Baptista van (1579–1644) in A Dictionary of Scientists (1 ed.)

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1654

Go to Guericke, Otto von (1602–1686) in A Dictionary of Scientists (1 ed.)

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1655

Go to Huygens, Christiaan (1629–95) in A Dictionary of Physics (6 ed.)

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1658

Go to Pepys, Samuel (1633–1703) in A Dictionary of World History (2 ed.)

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1661

Go to Malpighi, Marcello in Oxford Dictionary of English (3 ed.)

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1662

Go to Boyle, Robert (1627–92) in The Oxford Dictionary of Philosophy (2 rev ed.)

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Go to Royal Society in The Oxford Companion to British History (1 rev ed.)

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1665

Go to Royal Society in The Oxford Companion to British History (1 rev ed.)

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Go to Newton, Sir Isaac (1642–1727) in World Encyclopedia (1 ed.)

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1667

Go to transfusion in Concise Medical Dictionary (8 ed.)

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1672

Go to Cassini, Giovanni Domenico (1625–1712) in A Dictionary of Astronomy (2 rev ed.)

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Go to Newton, Sir Isaac (1642–1727) in World Encyclopedia (1 ed.)

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1674

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1676

Go to Cassini, Giovanni Domenico (1625–1712) in A Dictionary of Astronomy (2 rev ed.)

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1677

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1678

Go to Huygens, Christiaan (1629–95) in A Dictionary of Physics (6 ed.)

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1680

Go to Halley, Edmund (1656–1742) in A Dictionary of Physics (6 ed.)

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1686

Go to Ray, John (1607–1705) in The Oxford Companion to British History (1 rev ed.)

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1687

Go to Newton, Sir Isaac (1642–1727) in World Encyclopedia (1 ed.)

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1702

Go to phlogiston theory in A Dictionary of Physics (6 ed.)

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1714

Go to Fahrenheit, (Gabriel) Daniel (1686–1736) in A Dictionary of Scientists (1 ed.)

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1717

Go to Montagu, Lady Mary Wortley (1689–1762) in The Concise Oxford Companion to English Literature (3 ed.)

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1735

Go to Linnaeus, Carolus (1707–78) in A Dictionary of Plant Sciences (2 ed.)

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Go to Brandt, Georg (1694–1768) in A Dictionary of Scientists (1 ed.)

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1742

Go to Celsius, Anders (1701–1744) in A Dictionary of Scientists (1 ed.)

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1745

Go to Leyden jar in A Dictionary of Physics (6 ed.)

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1751

Go to nickel in Oxford Dictionary of English (3 ed.)

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1752

Go to midwifery in Concise Medical Dictionary (8 ed.)

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Go to Franklin, Benjamin (1706–90) in World Encyclopedia (1 ed.)

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1754
1758
1761

Go to percussion n. in A Dictionary of Nursing (5 ed.)

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Go to pathology in Concise Medical Dictionary (8 ed.)

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1766
1769

Go to Cook, James (1728–79) in A Dictionary of British History (1 rev ed.)

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1773

Go to Scheele, Carl Wilhelm in Oxford Dictionary of English (3 ed.)

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1774

Go to Priestley, Joseph in Oxford Dictionary of English (3 ed.)

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1775

Go to Cook, James (1728–79) in A Dictionary of British History (1 rev ed.)

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1781
1784
c. 1785

Go to Coulomb, Charles Augustin de (1736–1806) in World Encyclopedia (1 ed.)

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Go to Hutton, James (1726–97) in The Oxford Companion to British History (1 rev ed.)

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Go to Withering, William (1741–99) in The Continuum Encyclopedia of British Philosophy (1 ed.)

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1787

Go to Lavoisier, Antoine Laurent (1743–1794) in A Dictionary of Chemistry (6 ed.)

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1796

Go to Laplace, Pierre Simon, Marquis de (1749–1827) in World Encyclopedia (1 ed.)

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Go to Hahnemann, Samuel (1755–1843) in A Dictionary of Dentistry (1 ed.)

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1799

Go to Rosetta stone in World Encyclopedia (1 ed.)

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Go to Smith, William in Oxford Dictionary of English (3 ed.)

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1800

Go to Volta, Alessandro in Oxford Dictionary of English (3 ed.)

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1803
1807
1809

Go to Gay-Lussac, Joseph Louis (1778–1850) in World Encyclopedia (1 ed.)

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Go to Lamarck, Jean Baptiste de in Oxford Dictionary of English (3 ed.)

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1811

Go to Avogadro's law in A Dictionary of Physics (6 ed.)

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1812

Go to Cuvier, Georges, Baron (1769–1832) in World Encyclopedia (1 ed.)

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1816

Go to Laënnec, René Théophile Hyacinthe (1781–1826) in A Dictionary of Scientists (1 ed.)

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1817

Go to Fraunhofer, Joseph von (1787–1826) in World Encyclopedia (1 ed.)

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1820

Go to Ampère, André Marie (1775–1836) in World Encyclopedia (1 ed.)

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1821

Go to Fresnel, Augustin Jean (1788–1827) in World Encyclopedia (1 ed.)

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1822

Go to Champollion, Jean-François in Oxford Dictionary of English (3 ed.)

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1827

Go to Ohm, Georg Simon (1787–1854) in A Dictionary of Scientists (1 ed.)

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1828

Go to Burke and Hare [Crime] in The Oxford Dictionary of Reference and Allusion (3 ed.)

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1831
1832

Go to cholera in Concise Medical Dictionary (8 ed.)

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1835

Go to Dujardin, Félix (1801–1860) in A Dictionary of Scientists (1 ed.)

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1836

Go to Agassiz, Jean Louis Rodolphe (1807–1873) in A Dictionary of Scientists (1 ed.)

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1840

Go to Agassiz, Jean Louis Rodolphe (1807–1873) in A Dictionary of Scientists (1 ed.)

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1842

Go to Doppler, Christian Johann (1803–1853) in A Dictionary of Scientists (1 ed.)

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1843

Go to Agassiz, Jean Louis Rodolphe (1807–1873) in A Dictionary of Scientists (1 ed.)

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1845

Go to Nimrud, Iraq in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1846

Go to Morton, William Thomas Green (1819–1868) in A Dictionary of Scientists (1 ed.)

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1847
1848
1851

Go to Apiculture in The Oxford Encyclopedia of Economic History (1 ed.)

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Go to Helmholtz, Hermann Ludwig Ferdinand von (1821–1894) in A Dictionary of Scientists (1 ed.)

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Go to Foucault's pendulum in The Oxford Dictionary of Phrase and Fable (2 ed.)

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1852
1853

Go to Nineveh in A Dictionary of World History (2 ed.)

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1854

Go to Mendel, Gregor Johann (1822–84) in World Encyclopedia (1 ed.)

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Go to quinine in World Encyclopedia (1 ed.)

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1855
1856

Go to Neanderthal man in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1857

Go to Elysium in World Encyclopedia (1 ed.)

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1858
1859
1860
1861

Go to puerperal sepsis in A Dictionary of Public Health (1 ed.)

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1862

Go to pasteurization in A Dictionary of Public Health (1 ed.)

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c. 1864
1865

Go to Mendel, Gregor Johann (1822–84) in A Dictionary of Zoology (3 ed.)

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1867

Go to Nobel, Alfred Bernhard (1833–1896) in A Dictionary of Scientists (1 ed.)

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1869

Go to periodic table in World Encyclopedia (1 ed.)

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1871

Go to Morgan, Lewis Henry (1818–81) in The Concise Oxford Companion to American Literature (1 ed.)

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1875

Go to Przewalski's horse in The Oxford Dictionary of Phrase and Fable (2 ed.)

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Go to measles in A Dictionary of Public Health (1 ed.)

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1878
c. 1882

Go to Koch, Robert (1843–1910) in A Dictionary of Public Health (1 ed.)

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1883
1884

Go to prime meridian in The Oxford Companion to Ships and the Sea (2 ed.)

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Go to Frege, (Friedrich Ludwig) Gottlob (1848–1925) in The Concise Oxford Dictionary of Mathematics (4 ed.)

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1885

Go to rabies virus vaccines in A Dictionary of Public Health (1 ed.)

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1887

Go to Fick, Adolf Eugen (1829–1921) in A Dictionary of Zoology (3 ed.)

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1894

Go to Lowell, Percival (1855–1916) in A Dictionary of Astronomy (2 rev ed.)

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1895

Go to X-rays in The Oxford Companion to Medicine (3 ed.)

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1896

Go to Becquerel, Antoine Henri (1852–1908) in A Dictionary of Physics (6 ed.)

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1897
1898


Go to polonium in A Dictionary of Physics (6 ed.)

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Go to radium in A Dictionary of Public Health (1 ed.)

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1900

Go to aspirin n. in A Dictionary of Psychology (3 ed.)

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Go to Freud, Sigmund (1856–1939) in World Encyclopedia (1 ed.)

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Go to quantum theory in A Dictionary of Physics (6 ed.)

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Go to Pavlov, Ivan Petrovich (1849–1936) in A Dictionary of Biology (6 ed.)

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1901

Go to Muybridge, Eadweard (1830–1904) in The Oxford Companion to the Photograph (1 ed.)

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Go to Hammurabi, Code of in World Encyclopedia (1 ed.)

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1902
1903

Go to radiotherapy in A Dictionary of Physics (6 ed.)

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Go to Pavlov, Ivan Petrovich (1849–1936) in A Dictionary of Animal Behaviour (1 ed.)

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Go to Einthoven, Willem (1860–1927) in A Dictionary of Scientists (1 ed.)

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1904

Go to Chichén Itzá in The Oxford Companion to Archaeology (1 ed.)

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Go to Freud, Sigmund (1856–1939) in World Encyclopedia (1 ed.)

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1905

Go to photoelectric effect in World Encyclopedia (1 ed.)

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Go to syphilis in A Dictionary of Public Health (1 ed.)

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Go to special theory of relativity in A Dictionary of Astronomy (2 rev ed.)

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Go to mental age n. in A Dictionary of Psychology (3 ed.)

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Go to special theory of relativity in A Dictionary of Astronomy (2 rev ed.)

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1906

Go to Wasserman reaction in Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

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Go to Bordet, Jules Jean Baptiste Vincent (1870–1961) in Who's Who in the Twentieth Century (1 ed.)

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Go to allergy in Food and Fitness: A Dictionary of Diet and Exercise (1 ed.)

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Go to thermodynamics, laws of in The Oxford Dictionary of Phrase and Fable (2 ed.)

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Go to Alzheimer's disease in A Dictionary of Public Health (1 ed.)

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1907

Go to tuberculosis in Concise Medical Dictionary (8 ed.)

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Go to Homo in A Dictionary of Biology (6 ed.)

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1908

Go to Geiger counter in A Dictionary of Physics (6 ed.)

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1909

Go to Nicolle, Charles Jules Henri (1866–1936) in A Dictionary of Scientists (1 ed.)

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Go to Millikan's oil-drop experiment in A Dictionary of Physics (6 ed.)

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Go to Landsteiner, Karl (1868–1943) in A Dictionary of Scientists (1 ed.)

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1910

Go to sickle cell anaemia in A Dictionary of Biomedicine (1 ed.)

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Go to Morgan, Thomas Hunt (1866–1945) in A Dictionary of Scientists (1 ed.)

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1911

Go to Adler, Alfred (1870–1937) in Who's Who in the Twentieth Century (1 ed.)

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1912

Go to Piltdown, Sussex, England in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to continental drift in A Dictionary of Environment and Conservation (1 ed.)

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Go to Jung, Carl Gustav (1875–1961) in Who's Who in the Twentieth Century (1 ed.)

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1913

Go to Einstein, Albert (b. 14 Mar. 1879) in A Dictionary of Contemporary World History (3 ed.)

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Go to ozone layer in A Dictionary of Environment and Conservation (1 ed.)

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Go to Bohr, Niels Hendrik David (1885–1962) in A Dictionary of Scientists (1 ed.)

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1914

Go to Passenger Pigeon in The Oxford Encyclopedia of Food and Drink in America (1 ed.)

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1915

Go to Proxima Centauri in A Dictionary of Astronomy (2 rev ed.)

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Go to Typhoid Mary in A Dictionary of Public Health (1 ed.)

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Go to relativity in World Encyclopedia (1 ed.)

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Go to Serbia in Oxford Encyclopedia of the Modern World (1 ed.)

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1916
1918

Go to Influenza in Oxford Encyclopedia of the Modern World (1 ed.)

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1920
c. 1921

Go to Indus Valley civilization in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Adler, Alfred (1870–1937) in Who's Who in the Twentieth Century (1 ed.)

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1922

Go to Pauling, Linus Carl (1901–1994) in A Dictionary of Scientists (1 ed.)

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Go to Carter, Howard (1873–1939) in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Banting, Sir Frederick Grant (1891–1941) in A Dictionary of Scientists (1 ed.)

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1923

Go to Freud, Sigmund (1856–1939) in Who's Who in the Twentieth Century (1 ed.)

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1924

Go to Hubble, Edwin Powell (1889–1953) in A Dictionary of Scientists (1 ed.)

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1925

Go to Heisenberg, Werner Karl (1901–1976) in A Dictionary of Scientists (1 ed.)

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Go to Pauli, Wolfgang (1900–1958) in A Dictionary of Scientists (1 ed.)

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Go to Evolution and Creation Science in The Oxford Companion to the Supreme Court of the United States (2 ed.)

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1926

Go to Lindblad, Bertil (1895–1965) in A Dictionary of Scientists (1 ed.)

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c. 1927

Go to Woolley, Sir Charles Leonard (1880–1960) in Who's Who in the Twentieth Century (1 ed.)

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Go to uncertainty principle in World Encyclopedia (1 ed.)

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Go to Homo erectus in World Encyclopedia (1 ed.)

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Go to Frisch, Karl von (1886–1982) in A Dictionary of Scientists (1 ed.)

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1928

Go to Ellis, Henry Havelock (1859–1939) in The Concise Oxford Companion to English Literature (3 ed.)

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1929

Go to Hubble's law in A Dictionary of Space Exploration (3 ed.)

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1930

Go to Pauli, Wolfgang (1900–1958) in Who's Who in the Twentieth Century (1 ed.)

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1931

Go to Olduvai Gorge, Tanzania in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1932

Go to neutron in A Dictionary of Chemistry (6 ed.)

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Go to Tuskegee Experiment. in The Oxford Companion to United States History (1 ed.)

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1934

Go to Joliot-Curie, Irène (1897–1956) in Who's Who in the Twentieth Century (1 ed.)

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1935

Go to Richter scale in A Dictionary of Public Health (1 ed.)

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Go to Lorenz, Konrad Zacharias (1903–1989) in Who's Who in the Twentieth Century (1 ed.)

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1936
1937

Go to Krebs cycle in A Dictionary of Public Health (1 ed.)

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Go to Turing machine in The Concise Oxford Dictionary of Mathematics (4 ed.)

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1938
1939

Go to fission, nuclear in World Encyclopedia (1 ed.)

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Go to Pauling, Linus Carl (1901–1994) in Who's Who in the Twentieth Century (1 ed.)

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Go to Sutton Hoo, Suffolk, England in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Einstein, Albert (1879–1955) in A Dictionary of World History (2 ed.)

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1940

Go to penicillin in A Dictionary of Public Health (1 ed.)

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Go to Lascaux, France in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1942

Go to Mildenhall treasure in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Manhattan Project in A Dictionary of World History (2 ed.)

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1943
1945

Go to Hiroshima in A Dictionary of Contemporary World History (3 ed.)

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1946

Go to Bikini atoll in The Oxford Essential Dictionary of the U.S. Military (1 ed.)

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1947

Go to Dead Sea Scrolls in The Concise Oxford Dictionary of the Christian Church (2 rev ed.)

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Go to transistor in The Oxford Companion to the History of Modern Science (1 ed.)

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1948

Go to Kinsey, Alfred Charles (1894–1956) in Who's Who in the Twentieth Century (1 ed.)

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Go to Wiener, Norbert (1894–1964) in Who's Who in the Twentieth Century (1 ed.)

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Go to Palomar Observatory in A Dictionary of Astronomy (2 rev ed.)

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Go to Skinner box in The Oxford Companion to the Mind (2 ed.)

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1949

Go to Pazyryk, Siberia, Russia in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Joe One in The Oxford Essential Dictionary of the U.S. Military (1 ed.)

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Go to Frisch, Karl von (1886–1982) in A Dictionary of Zoology (3 ed.)

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Go to Lévi-Strauss, Claude (1908–2009) in Dictionary of the Social Sciences (1 ed.)

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Go to Libby, Willard Frank (1908–1980) in A Dictionary of Scientists (1 ed.)

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1950

Go to Teller, Edward (1908–2003) in The Oxford Companion to United States History (1 ed.)

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Go to Tollund, Denmark in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1951

Go to Djerassi, Carl (1923–) in A Dictionary of Scientists (1 ed.)

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1952

Go to Linear B in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1953

Go to Salk, Jonas Edward (1914–1995) in A Dictionary of Scientists (1 ed.)

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Go to Kinsey Reports in A Dictionary of Public Health (1 ed.)

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Go to nuclear bomb in The Oxford Companion to the History of Modern Science (1 ed.)

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Go to Piltdown, Sussex, England in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to double helix in The Oxford Companion to the History of Modern Science (1 ed.)

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c. 1955

Go to Phidias (c.430 bc) in The Oxford Dictionary of Art and Artists (4 ed.)

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1957

Go to Chomsky, Noam Avram (1928– ) in Who's Who in the Twentieth Century (1 ed.)

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Go to Sputnik in World Encyclopedia (1 ed.)

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Go to NASA in A Dictionary of Contemporary World History (3 ed.)

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Go to Sputnik in The Oxford Companion to the History of Modern Science (1 ed.)

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1959

Go to Luna in A Dictionary of Astronomy (2 rev ed.)

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Go to Leakey, Louis Seymour Bazett (1903–1972) in Who's Who in the Twentieth Century (1 ed.)

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Go to Luna in A Dictionary of Astronomy (2 rev ed.)

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Go to Luna in A Dictionary of Astronomy (2 rev ed.)

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1960

Go to Birth Control and Family Planning. in The Oxford Companion to United States History (1 ed.)

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1961

Go to Gagarin, Yuri Alexeyevich (1934–68) in A Dictionary of Space Exploration (3 ed.)

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Go to Shepard, Alan Bartlett (1923–98) in A Dictionary of Space Exploration (3 ed.)

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Go to thalidomide in The Oxford Companion to the Body (1 ed.)

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Go to Kennedy, John F. (1917–63) in A Dictionary of Space Exploration (3 ed.)

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1962
1963

Go to Carson, Rachel (1907–1964) in The Oxford Companion to United States History (1 ed.)

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Go to Tereshkova, Valentina Vladimirovna (1937– ) in A Dictionary of Space Exploration (3 ed.)

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1964

Go to Homo habilis in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Penzias, Arno Allan (1933–) in A Dictionary of Scientists (1 ed.)

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Go to cardiothoracic surgery in The Oxford Companion to Medicine (3 ed.)

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1965

Go to Leonov, Aleksei Arkhipovich (1934– ) in A Dictionary of Space Exploration (3 ed.)

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1966

Go to Luna in A Dictionary of Astronomy (2 rev ed.)

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Go to plate tectonics in World Encyclopedia (1 ed.)

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Go to Luna in A Dictionary of Astronomy (2 rev ed.)

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1967

Go to Barnard, Christiaan Neethling (1922–2001) in Who's Who in the Twentieth Century (1 ed.)

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1968

Go to Olduvai Gorge, Tanzania in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Apollo project in A Dictionary of Space Exploration (3 ed.)

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Go to Apollo project in A Dictionary of Space Exploration (3 ed.)

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1969

Go to Armstrong, Neil Alden (1930–2012) in Who's Who in the Twentieth Century (1 ed.)

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Go to rock art in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to in vitro fertilization in The Oxford Companion to the History of Modern Science (1 ed.)

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1971

Go to Salyut in A Dictionary of Space Exploration (3 ed.)

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Go to lunar roving vehicle in A Dictionary of Space Exploration (3 ed.)

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1972

Go to Tuskegee Experiment. in The Oxford Companion to United States History (1 ed.)

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1974

Go to Sian in The Concise Oxford Dictionary of World Religions (1 rev ed.)

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1975

Go to Apollo–Soyuz Test Project in A Dictionary of Space Exploration (3 ed.)

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Go to Newgrange, Co. Meath, Ireland in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1976

Go to Leakey, Mary (1913–1996) in The Oxford Encyclopedia of Women in World History (1 ed.)

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Go to Viking in A Dictionary of Astronomy (2 rev ed.)

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Go to Viking in A Dictionary of Astronomy (2 rev ed.)

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c. 1977

Go to Vergina, Macedonia, Greece in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1978
1979

Go to smallpox in Concise Medical Dictionary (8 ed.)

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1981

Go to AIDS in Concise Medical Dictionary (8 ed.)

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1982

Go to Windover, Florida, USA in The Concise Oxford Dictionary of Archaeology (2 ed.)

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1983

Go to Montagnier, Luc (1932–) in A Dictionary of Scientists (1 ed.)

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1984

Go to Hominid Evolution in Encyclopedia of Evolution (1 ed.)

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1985

Go to Human Genome Project in A Dictionary of Genetics (7 ed.)

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1986

Go to Challenger in A Dictionary of Space Exploration (3 ed.)

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Go to Mir in A Dictionary of Space Exploration (3 ed.)

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Go to zidovudine in A Dictionary of Public Health (1 ed.)

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1988
1989

Go to Galileo probe in A Dictionary of Space Exploration (3 ed.)

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Go to Berners-Lee, Sir Tim (1955–  ) in A Dictionary of Computing (6 ed.)

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1990

Go to Hubble Space Telescope in A Dictionary of Space Exploration (3 ed.)

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Go to Berners-Lee, Sir Tim (1955–  ) in A Dictionary of Computing (6 ed.)

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1991

Go to Berners-Lee, Sir Tim (1955–  ) in A Dictionary of Computing (6 ed.)

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Go to Similaun Man in The Oxford Companion to Archaeology (1 ed.)

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Go to Galileo probe in A Dictionary of Space Exploration (3 ed.)

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1994

Go to Ardi in New Oxford American Dictionary (3 ed.)

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Go to France in A Dictionary of World History (2 ed.)

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1995

Go to Galileo probe in A Dictionary of Space Exploration (3 ed.)

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1996
1997

Go to Sojourner in A Dictionary of Space Exploration (3 ed.)

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1998

Go to Seahenge, Norfolk, England in The Concise Oxford Dictionary of Archaeology (2 ed.)

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Go to Viagra n. in A Dictionary of Psychology (3 ed.)

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Go to International Space Station in A Dictionary of Space Exploration (3 ed.)

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1999

Go to human genome project in The Oxford Companion to the History of Modern Science (1 ed.)

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2000

Go to Human Genome Project in A Dictionary of Genetics (7 ed.)

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Go to human immunodeficiency virus in World Encyclopedia (1 ed.)

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2003

Go to Human Evolution in The Oxford Companion to Archaeology (1 ed.)

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Go to Columbia in A Dictionary of Space Exploration (3 ed.)

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Go to severe acute respiratory syndrome in A Dictionary of Public Health (1 ed.)

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2005

Go to SARS in Concise Medical Dictionary (8 ed.)

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Go to transplant in World Encyclopedia (1 ed.)

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2006

Go to International Astronomical Union in A Dictionary of Astronomy (2 rev ed.)

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Go to Tübingen in The Concise Oxford Dictionary of the Christian Church (2 rev ed.)

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2008

Go to Tübingen in The Concise Oxford Dictionary of the Christian Church (2 rev ed.)

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2009

Go to Large Hadron Collider in A Dictionary of Physics (6 ed.)

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2010

Go to genome in A Dictionary of Biomedicine (1 ed.)

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2011

Go to stem cells in A Dictionary of Genetics (7 ed.)

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