A building contractor's fascination with ancient shells is unique and contagious.
Growing up on the Maine coast, Stephen Felton remembers, "I spent practically every Sunday at a clambake. And I was always looking at echinoderms, gastropods, and clams." He'd pick up the shells and wonder: How old were they? How did they get their food? Why did they die? He never lost his curiosity about these creatures, even when he moved to landlocked Cincinnati in 1955 to marry and become a building contractor. And soon, he found something better than seashells: "Fossils! Boy, there were fossils literally everywhere, from down by the Ohio River to the highest hills."