Genetics is thought to be the primary cause of acne in 80% of cases. The role of diet and cigarette smoking is unclear, and neither cleanliness nor exposure to sunlight appear to play a part. During puberty, in both sexes, acne is often brought on by an increase in hormones such as testosterone.
Grand Marais, Minnesota. Grand Marais is a city in Cook County, Minnesota, United States. The population was 1,351 at the 2010 census. It is also the county seat and sole municipality of Cook County.
Paris's Arc de Triomphe, the largest triumphal arch in the world, is at the center of the Place Charles de Gaulle-Ãtoile, at the northwest end of the Avenue des Champs-ÃlysÃ©es (map). The huge arch was commissioned by Napoleon in honor of his Grande ArmÃ©e and its 128 victorious battles (1805-1809).