Semester at Sea Atlantic or west across the Pacific, visiting from 10 to 11 countries in Asia, Africa, Europe, South America and North America. The program previously had voyages that would sail through the Mediterranean and the Suez Canal, but due to piracy concerns in the Gulf of Aden, voyages now typically travel around Africa. For many years, ISE hosted a shorter 65-day Semester at Sea program in the summer that concentrated on one general region of the world. In May 2011, Semester at Sea introduced a new short-term or Maymester voyage with a curriculum focused on the UN Millennium Development Goals. These
Genetic history of Europe of eastern Asian mtDNA haplogroups, some of which survive in modern eastern European populations. Maternal gene flow to Europe from sub-Saharan Africa began as early as 11,000 years BP, although the majority of lineages, approximately 65%, are estimated to have arrived more recently, including during the Romanization period, the Arab conquests of southern Europe, and during the Atlantic slave trade. A 2007 study by Bauchet, which utilised about 10,000 autosomal DNA SNPs arrived at similar results. Principal component analysis clearly identified four widely dispersed groupings, corresponding to Africa, Europe, Central Asia and South Asia. PC1 separated Africans from the other