Technology has as advanced a lot in fast moving world . Today underwater tunnels are often created with humongous tunnel boring machines (tbm) sometimes these are called as moles. These machine cost millions of dollars, but they can create large tunnels in a very short time.
Engineers are always coming up with new ideas .Based upon on experimental rocking methods , tomorrow's under water tunnels are might be built with the help of high water pressure belts , lasers and ultrasonic sound machines.
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