1 Myotonic (also called MMD or Steinert's disease). 2  The most common form of muscular dystrophy in adults, myotonic muscular dystrophy affects both men and women, and it usually appears any time from early childhood to adulthood. 3  In rare cases, it appears in newborns (congenital MMD).
There are around 66 scientific bases in Antarctica, of which about 37 are occupied year round. There are about 4,000 people through the summer months and about 1,000 overwinter each year.
No one really knows how many polar bears there are because they are hard to count, and at times hard to find.Researches estimate that there are between 22 000 and 40 000 polar bears in the world.Close to half of the polar bear population lives in Canada.