Sunday, June 6, 2010
Why do we get hot when we exercise? I guess it's because our bodies are burning fuel to make energy and that produces heat, much like an internal combustion engine gets hot when it burns gas. But wait - internal combustion engines work by causing small explosions - they ignite gasoline or another fuel source. Is that how our muscles work too? If so, could we make engines that run on the same fuel as our bodies? What do our bodies burn when we exercise? On further consideration, we do have engines that burn the same fuel - animal engines. However, they've been largely displaced by easier to maintain internal combustion engines. Are they cleaner? Are they really easier to maintain? In any case, what if we could make engines that are just as easy to maintain as internal combustion engines that we powered by food?? Are petroleum based internal combustion engines really all that clean or easy to maintain in the long run? Petroleum is certainly not a renewable resource.
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