The map above is probably the most detailed map of Medieval Trade Routes in Europe, Asia and Africa in the 11th and 12th centuries you can find online. It includes major and minor locations, major and minor routes, sea routes, canals and roads.
Birds of North America (BNA) is the most comprehensive reference for the life histories of over 760 bird species that breed in the United States and Canada. Species accounts are written by ornithologists and other experts and are an essential reference for anyone with an advanced interest in birds.
John Preskill is a theoretical physicist and the Richard P. Feynman Professor of Theoretical Physics at Caltech. In this episode we cover what John’s been focusing on for years: quantum information, quantum computing, and quantum error correction.