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Dr. Jeff | 6 months ago (raw) | export | reply | flag +21 
 - The wheel
- Electricity
- Indoor plumbing
- The internal combustion engine
- The airplane
- The internet
- #Bitcoin  

World-changing, humanity-improving inventions/discoveries.
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The Beave | 6 months ago (raw) | root | parent | reply | flag +1 
 The printing press...
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BTC_Cricket | 6 months ago (raw) | root | parent | reply | flag 
 - Printing press
- Spinning Jenny

Couple more 😃
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b203872c | 6 months ago (raw) | root | parent | reply | flag 
 Fire...
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skyrose | 6 months ago (raw) | root | parent | reply | flag 
 Printing press
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tom | 6 months ago (raw) | root | parent | reply | flag 
 Bitcoin is in a class of its own