Wallace Line to the west of the Philippines. Wallace's studies in Indonesia demonstrated the emerging theory of evolution, at about the same time as Joseph Dalton Hooker and Asa Gray published essays also supporting Darwin's hypothesis. Understanding of the biogeography of the region centers on the relationship of ancient sea levels to the continental shelves. Wallace's Line is visible geographically when the continental shelf contours are examined; it can be seen as a deep-water channel that marks the southeastern edge of the Sunda Shelf which links Borneo, Bali, Java, and Sumatra underwater to the mainland of southeastern Asia. Australia is likewise connected
Line A (EuskoTran) Line A (EuskoTran) The Line A of Euskotren Tranbia, also known simply as Bilbao's Tram is a tramway system in Bilbao, Spain which began operation in December 2002. It is one of the two light rail tram lines operated by Euskotren Tranbia in the Basque Country, the other one being Vitoria-Gasteiz's tram. The service is operated by Euskotren Tranbia, part of Eusko Trenbideak. Bilbao's Tram, or Line A (map icon ), serves twelve stations, several of them with interchanges and connections with Metro Bilbao, EuskoTren and Cercanías Bilbao. The factor leading its creation was to improve Bilbao's railway network; the