They have done time as jewelry and tools, as medicines, currency, and symbols of industry--and they have intrigued people, from beach-combing toddlers to serious scientists, since time began. Native interest meets natural history in this exquisitely illustrated account of the science and culture of seashells. With closeup photography and basic explanations of different shell types--univalves, bivalves, and cephalopods--how they are formed, what mollusks...