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    ‘Lead’ pencils have never actually contained any traces of lead, but rather a mix of graphite and other materials.

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19th January


On this day in 1915, A forerunner to neon lighting was patented by Georges Claude... Read more »

On this day in 1917, An explosion of TNT occurred at an ammunitions factory in Silvertown, England... Read more »

On this day in 1937, Howard Hughes set a new transcontinental air speed record.... Read more »


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