Wildlife of Cape Verde across the Atlantic to breed from May to October. The most prominent species is the endangered loggerhead sea turtle ("Caretta caretta"). Other species of turtle are the hawksbill sea turtle ("Eretmochelys imbricate") which is critically endangered; the green sea turtle ("Chelonia mydas"), endangered; leatherback sea turtle ("Dermochelys coriacea") and olive ridley sea turtle ("Lepidochelys olivacea"). Hunting of sea turtles remains prevalent per an UNEP report, however turtle conservation measures began in 2008. Eighteen species of whales and dolphins have been recorded in the waters of the Cape Verde archipelago. The area is cited as one of two known breeding grounds
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