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When early man attached a stick to a sharpened piece of stone, he set in motion a trend in the creation of tools: the mashup. Today, almost all tools combine at least a few different technologies. What are some popular invention mashups?
You'd be surprised how much thought goes into the disposal of sewage from space shuttle toilets. It may not surprise you that NASA scientists have that all figured out, but the solution will probably raise an eyebrow or two.