Topics from May 2019
- When do we use a modem?
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- When was the CN Tower built?
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- When was the telescope invented?
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- When was Braille invented?
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- When was the first microscope used?
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- When was atom structure discovered?
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- When did Rutherford first split the atom?
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- When was gunpowder first used?
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- When were fireworks introduced?
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- When was yeast first used in baking?
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- When did the canning of food and drink first start?
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- When was the first electric lamp in use?
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- When do we see the spectrum of light?
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- When was lightning first understood?
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- When does lightning strike?
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- When was the first metal bridge built?
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- When was the heyday of canal building?
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- When was the internet started?
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- When was the television invented?
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- When was Morse code developed?
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- When were matches invented?
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- When was fire discovered?
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- When did the Chernobyl disaster occur?
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- When were nuclear weapons first used?
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- When did gold mining begin?
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- When was the hovercraft invented?
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- When was the first aeroplane flight?
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- When was stained glass windows introduced?
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- When were the first books made?
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- When was paper first made?
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- When was clay first used?
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- When was the first plastic made?
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