How Does Aspirin Find A Headache? - Plot & Excerpts
Why is one covered when the next two are topless? The most obvious advantage to a covered bridge is that it blocks “the elements,” particularly snow. Accumulated snow can render a bridge impassable, and it is true that covered bridges are found most often in cold climates. Of course, one could argue that engineers should design covers for all roadways. But as we learned in Do Penguins Have Knees? (ah, but have we retained it?), bridges remain frozen long after adjacent road surfaces, primarily because bridge surfaces are exposed to the elements from all sides, the bottom as well as the top. But then some folks believe that covered wooden bridges were originally constructed to ease the fears of horses, who were skittish about crossing bridges, particularly if they saw torrents of water gushing below. The fact that covered bridges resembled wooden barns supposedly also allayed the horses’ anxiety. This question is reminiscent of one of our chestnut-Imponderables: Why do ranchers hang boots upside-down on fenceposts?
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