1433, the great voyages of Admiral Zheng He -- 1453, the fall of Constantinople -- 1455, Gutenberg's print revolution -- 1492, the Columbian exchange -- 1600, the British East India Company -- 1648, the treaty of Westphalia -- 1676, Van Leeuwenhoek's microscope -- 1751, Diderot's enlightenment encyclopedia -- 1787, the American experiment -- 1789, the French Revolution -- 1838, the British slavery abolition act -- 1839, the opium war in China -- 1859, Darwin and the Origin of species -- 1869, binding continents -- 1893, first women voters in New Zealand -- 1896, the invention of motion pictures -- 1903, Kitty Hawk and powered flight -- 1904, the Russo-Japanese war -- 1928, the discovery of penicillin -- 1942, the dawn of the atom -- 1969, walking on the moon -- 1972, China enters the world balance -- 1989, the fall of the Berlin wall -- 2004, the rise of social media.