2. 1838 - The Morse Code is introduced by Samuel Morse.
3. 1853 - The first jeans are made by Levi Strauss for Califonia gold miners!
4. 1800 - World Population crosses one billion for the first time!
5. 1848 - The California Gold Rush begins!
6. 1815 - The first three verses of "Mary had a Little Lamb" are written by John Roulstone after his classmate, Mary Sawyer, who came to school followed by her pet lamb.
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