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  • they were all developed by people to solve some problem that they saw at the time
  • they all use natural phenomena that the people that created them understood at the time
  • they all required manipulation and/or modification of matter
  • etc.
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7y ago
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12y ago

Wars forced innovation. The need for better health care spurred social reform and innovation.

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12y ago

Tools have evolved over time by changing from tools made of stone and wood to electronic tools.

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Q: How did technology change from 1920 to 2000?
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