Introduce your favorite collector to an exciting series with this dramatic bi-colored 2021 titanium coin. This striking coin is the eighth and newest issue in Ghana’s Titans of American Innovation 12-coin series. A geology professor at Princeton University, Hess was a pioneer in ocean floor mapping and the theory of sea-floor spreading. Later, his work with NASA was instrumental in the science of lunar exploration. This Uncirculated 2 Cedis commemorative from Ghana makes a great gift for those interested in historic innovators – order now!