Waves move all around us, rolling across oceans and breaking upon shores. They propagate through air as music and speech. They speed through rock during earthquakes.

My father was a professor of wave mechanics, so I grew up knowing waves are everywhere. Already tuned in to waves, during my formal education I paid special attention whenever coursework covered their action. High school physics taught me how waves ring outward concentrically when a pebble is tossed in...
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