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Humans learn to use fire
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The wheel was invented.
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The water pump was invented
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paper was invented
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Humans begin using metals
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Writing sistems are invented
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Galileo Galilei's telescope was invented
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Volta invented electricity
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Telephone was invented by Meucci
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x-ray was invented
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television was invented
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first computer was invented
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email was invented
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mobile phone was invented
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windows operating system was invented
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wifi networks was invented
