1820 : The Missouri Compromise is signed into law by President James Monroe. The compromise allows Missouri to enter the Union as a slave state, brings Maine into the Union as a free state, and makes the rest of the northern part of the Louisiana Purchase territory slavery-free.
1836 : The Battle of the Alamo ends with all 187 Texas volunteers killed and the fort captured by the Mexican troops.
1869 : Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society
1899 : Bayer registers aspirin as a trademark.
1912 : The Oreo cookie is introduced by Nabisco
1957 : Ghana becomes the first Sub-Saharan country to gain Independence from the British.
2008 : The discovery of the Rings of Saturnian moon Rhea, the first known rings around a moon, is announced.
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