Dolphins are recognized as the seas most intelligent creatures. Scientists believe that these ocean mammals communicate with one another through a series of complex sounds. They are curious and gentle creatures, often enjoying the company of humans. National Geographic Dolphins 2018 will make a splash with anyone who is fascinated by ocean life. Several dolphin species are featured: Bottlenose, Atlantic spotted, Common, Spinner, and Striped. Each outstanding image is accompanied by a spacious grid with moon phases and international holidays. National Geographic supports vital work in conservation, research, exploration, and education. The calendar includes a 3-year at-a-glance page and is earth friendly, printed with soya-based inks on FSC certified paper.