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276 BCE
Ertaosthenes born
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195 BCE
Eratosthenes died
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85
Ptolemy born
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165
Ptolemy died
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Feb 19, 1473
Copernicus born
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1514
Copernicus showed Little Clmmentary report to astronomy-minded friends
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1532
Copernicus completed Astronomical Manuscript
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1541
Copernicus published Astronomical Manuscript
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May 24, 1543
Copernicus died
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Feb 15, 1564
Galileo was born
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Galileo published “Dialogue Concerning the Two Chief World Systems — Ptolemaic and Copernican”
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Galileo was convicted of heresy for his book
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Galileo published “Discourses and Mathematical Demonstrations Relating to Two New Sciences”
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Galileo died
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Newton was born
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Newton published “Mathematical Peinciples of Natural Philosophy”
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Newton was made president of the Royal Society of London for Improving Natural Knowledge
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Newton published “Opticks”
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Newton died
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Darwin was born
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Darwin went on a voyage on the HMS Beagle and saw lots of evidence for his theory
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Mendeleev was born
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Darwin published "On the Origin of Species"
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One of the first internationl chemistry conferences was held and the measuring system of atomic weight was decided on
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Mendeleev wrote "Organic Chemistry"
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Marie Curie was born
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Mendeleev published the first edition of "Principles of Chemistry" about inorganic chmistry
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Mendeleev drempt of a table where all of the elements fell into the right spots
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Julius Lother Meyer published a paper describing an organization the same as Mendeleev's, but Mendeleev's ideas were used
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Wegener Born
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Darwin died
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The noble gases were discovered and put into the table
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Marie Curie earned a physics degree
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Helium (the second most abundant gas) was dicovered
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Marie Curie begins work on radioactivity and solves why uranium gave off a new narrow beam of energy
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Marie Curie disovered Polonium and Radium
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Curie disovered beta rays and alpha rays
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Marie Curie and her husband see radioactive radiation
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Marie Curie and her husband become sick from the years of radiation exposure
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Curie recieves her doctorate degree
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Hess born
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Mendeleev died
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Wegener discovered South America fit perfectly against the west coast of Africa
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Wegener co-wrote "The Thermodynamics of the Atmosphere" textbook
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Wegener published "The Origin of Continents and Oceans"
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Crick was born
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Franklin was born
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Wegener attended an international conference in new York where others joked and almost insulted his ideas
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Watson was born
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Wegener Died
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Marie Curie died
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Linus Pauling, a pioneer of X-ray crystallography concluded the general shape of DNA must be a helix
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Franklin took a very clear X-ray diffraction image of DNA
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Watson admitted that he and Crick couldn't have found the double helix without Franklin
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An issue of Nature published Watson and Crick's article "A Structure for Deoxyribose Nucleic Acid"
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Franklin died
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Hess published his theory of seafloor spreading in "History of Ocean Basins"
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Watson, Wilkins, and Crick received the Nobel Prize in medicine/physiology but Franklin couldn't since she had passed away
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Geologists realized Earth's magnetic field had reversed polarity many times
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Hess died
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Geologists agreed on the term "plate tectonics"
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Crick died