Cell theory By WilliamLoenOrians Jan 1, 1609 discovered how your stomach works Jan 1, 1634 telescope was invented Nov 11, 1668 spontainious generation did not happen Jan 1, 1674 first describtion of bacteria Jan 1, 1805 animal classification was invented Nov 11, 1831 cell nucleus found Jan 1, 1837 found cell + germ theory Jan 1, 1839 whole organisms dont get sick Nov 11, 1864 found out what spoiled food.