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276 BCE
Eratosthenes born
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240 BCE
Eratosthenes measured the Earth
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230 BCE
Eratosthenes was inspired by astronomy
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194 BCE
Eratosthenes died
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7
Marie Curie born
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1564
Galileo born
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Galileo creates a machine for calculations
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Galileo discovers Jupiter's 4 moons, proving heliocentric theory
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Galileo dies
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Charles Darwin Born
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Darwin begins college
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Darwin publishes book on natural selection and evolution
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Alred Wegener born
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Darwin dies
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Marie Curie marries Pierre
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Radium discovered
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Marie Curie discovers polonium
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Harry Hess born
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Wegner proposes continental drift
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Marie discovers the first portable x-ray machine
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Francis Crick born
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Rosalind Franklin born
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James Watson born
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Marie Curie dies
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Harry Hess 'discovered' plate tectonics'
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Rosalind Franklin's best picture of DNA is taken
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Watson and Crick discover DNA's double helix structure
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Rosalind Franklin died
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Harry Hess died
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Francis Crick dies