Topsail Island beaches up into the sand dunes. There are four main species that can be found on and around the island which are loggerhead, green, leatherback, and Ridley sea turtles. One species specifically that has been the main theme of protection is the Loggerhead Sea Turtle. This turtle has been the basis for the stationing of the Sea Turtle Rescue and Rehabilitation Center in Topsail Island, North Carolina. Their mission is the protection and watching over of the 26 mile stretch of beach that is Topsail Island. They are committed to the overseeing of hatching of the eggs, caring for sick
History of manifolds and varieties History of manifolds and varieties The study of manifolds combines many important areas of mathematics: it generalizes concepts such as curves and surfaces as well as ideas from linear algebra and topology. Certain special classes of manifolds also have additional algebraic structure; they may behave like groups, for instance. In that case, they are called Lie Groups. Alternatively, they may be described by polynomial equations, in which case they are called algebraic varieties, and if they additionally carry a group structure, they are called algebraic groups. The term "manifold" comes from German "Mannigfaltigkeit," by Riemann. In English, "manifold" refers to