December 9, 1979: Smallpox is officially declared eradicated
On December 9, 1979, a commission of scientists declare smallpox has been eradicated. The disease, which carries around a 30 percent...
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December 9, 1868: The world’s first traffic light was introduced
On 9 December 1868,[4] the first non-electric gas-lit traffic lights were installed outside the Houses of Parliament in London to co...