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
African admixture in Europe Europe may have a common origin in Asia (e.g. Y haplogroups R1, and some paternal haplogroup T and U subclades). One subclade of haplogroup U, namely U6a1, is known to have expanded from northern and eastern Africa back into Europe even though haplogroup U6 is considered to have originated in the Middle East. Other lineages are known to have moved from Europe directly into Africa, for example mitochondrial haplogroups H1 and H3. Such bidirectional migrations between Africa and Eurasia complicate the task of defining admixture. One proposed example of Holocene gene flow from Africa to Europe, via the Middle East,