Loggerhead musk turtle Loggerhead musk turtle The loggerhead musk turtle ("Sternotherus minor" ) is a species of turtle in the family Kinosternidae. The species is native to the southern United States. Within the southeastern United States, the loggerhead musk turtle can be found in Alabama, northern Florida, Georgia, extreme southeastern Kentucky, extreme eastern Louisiana, Mississippi, extreme western North Carolina, eastern Tennessee, and extreme southwestern Virginia. The loggerhead musk turtle gets its common name from its unusually large head, compared to the common musk turtle ("Sternotherus odoratus"). Adults can be 8–13 cm (3–5 inches) in straight carapace length. Barbels are present on the chin
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