I was driving to Mumbai on the expressway a few days ago and one of those questions hit me for the umpteenth time, you know the type that is never quite answered but isn't really important in life so you just let it go. 'Why is it that road tunnels have concrete arches at both ends, at both the mouths of the tunnel?' This time, I decided I would not let it go so I called a friend, a civil engineer and asked him.
Him: "Ever tried to carve a tunnel into the little hillock you have built on the beach?"
Sometimes a question explains it best.
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