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fire was found by cave men
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first motor to spin
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a better engine is maded
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steam engines is made to help mobilize people
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the light bulb help familys move throuth the night
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the steam train allowed men and women to travel far distant
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the first power plant was made to make electricty
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the chemistry set is made
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the first automobil is used
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the dam is used to create electricity
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toyoata creats an eco friendly car
