Cover story
The greatest events in the history of chemistry. From ancient times to the present
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4000 BC Glassmaking, brickmaking, and copper smelting are practiced.
3000 BC Coal is used as a fuel petroleum and bitumen (asphalt) in adhesives, waterproofing and roads.
3100 BC Candles are in use.
2200 BC Crude oil is refined in China for lamps and heating.
1750 BC The Sumerians brew beer.
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