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276 BCE
Eratosthenes born
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240 BCE
Eratosthenes discovers a way to calculate prime numbers
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240 BCE
Eratosthenes discovers a way to measure the size of the earth
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240 BCE
Eratosthenes known as the father of geography
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240 BCE
Eratosthenes created an accurate map of the earth
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240 BCE
Eratosthenes discovered there are 365 days in a year
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194 BCE
Eratosthenes died
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Period: 100 to 160
Ptolemy
He was the first person to make popular the geocentric theory. He explained how the planets had epicycles which is why they sometimes orbit in the sky. -
Feb 19, 1473
Copernicus Born
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1514
Copernicus wrote The Little Commentary
This was about the heliocentric theory and it was the first time the world had seen it -
1532
Copernicus finished an astronomical manuscript
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1543
Copernicus died
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1564
Galileo born
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Galileo discovered Copernicus was right
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Galileo published Letters on Sunspots
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Galileo dies
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Newton was born
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Newton published Mathmatical Principles of Natural Philosophy
This described this three laws of motion -
Newton died
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Charles Darwin Born
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Charles Darwin goes on the voyage of Discovery
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Charles Darwin writes "The Origin of Species"
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Charles Darwin publishes "The Origin of Species II"
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Marie Curie was born in Poland
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Wegener born
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Marie Curie graduated from high school with top grades
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Wilhelm Roentgen discovered X-rays which would later inspire Marie Curie
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Charles Darwin dies
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Marie Curie discovered Polonium
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Earnest Rutherford discovered alpha and beta rays and inspired Curie
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J. J. Thompson influenced Curie by stating certain rays were made up of particles smaller than atoms
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Curie accepted the Decay theory which was made by Rutherford
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Curie discovered that energy doesnt come from a material's surface, it comes from within the atoms
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Curie got her doctorate in physics
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Curie was first woman to win the nobel prize
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Rutherford coined the term Half-life and inspired Curie
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Textbook explaining radiation treatment for cancer patients was published
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Albert Einstein discovered that very small particles can carry a lot of energy
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Wegener went on and expedition to Greenland to chart the coast line
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Hess born
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Wegener discovers info about continental drift
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Wegener used fossils to produce evidence that continents used to be one
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Wegener published The Origins of Continents and Oceans
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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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Wegener died
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Marie Curie dies of Leukemia
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Crick joined the British Admiralty Research Laboratory
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Hess's plate tectonic theory was born
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Crick attached to the Cavendish Research Unit where he focused on researching DNA
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Rosalind Franklin took X-rays of DNA to show the repeating structure
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Crick discovered the structure of DNA and published a work explaining that and other info about human genes
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Watson announces the structure of DNA
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Franklin's structure of DNA published
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Maurice Ewing and Bruce Heezen inspire Hess to discover more about the spreading of tectonic plates
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Rosalind Franklin dies
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Hess published History of Ocean Basins
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Crick awarded the Nobel Peace Prize
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Nobel Peace Prize awarded to James Watson
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Harry Hess died
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Plans for sequencing human genome laid out by james Watson
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Francis Crick dies