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To date, what do you think is the greatest invention or discovery and why?

Mine is the computer. I continue to be amazed at what we can do with them.

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  • The plow. It allowed early river valley peoples to generate semi-reliable food surpluses, and those food surpluses triggered everything that came after. I can't take credit for this argument, I first encountered it in this episode from the first season of Connections.

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