How did a boy from the South Dakota prairies end up as a tropical oceanographer? When he was young, Gregg roamed the hills on horseback, hunting for fossils and rattlesnake dens, dreaming of adventure in faraway lands. Fuelled by a boundless thirst for knowledge (and exotic food), always open to the call of serendipity, Gregg abandoned a budding career in music to go in pursuit of .... MUD. Why mud? Layers of sediment in lakes and oceans reveal...