4000-3500 BCE - The Wheel (Mesopotamia), 2000 BCE - Scissors (China), 100 BCE - Paper (China), 7th Century  - Toothbrush (China), 9th Century - Gunpowder (China), 1286 CE - Eyeglasses (Italy), 1439 - Printing Press (Holy Roman Empire/Germany), 1643 - Mechanical Calcualator (France), 1709 - Piano (Italy), 1879 - Lightbulb (USA), 1928 - Penicilin (UK), 1930s - Nuclear Energy (USA), 1945 - Microwave (USA), 1957 - Sputnik 1 (Soviet Union), 1973 - Cell phone (USA), 1996 - Google (USA), 2004 - Facebook (USA), 2005 - Youtube (USA),

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