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
Gerald Wallace blocks (an average of .3 per game) and his averages were down across the stat line from 2005. Wallace improved his play in the second month of the season, but he went down with a separated shoulder in a December game against the Indiana Pacers. When he returned, Wallace continued his fine play finishing the season averaging 18.1 points, 7.2 rebounds, 2.6 assists, 2 steals, and 1 block in 72 games. Wallace appeared opposite Tim Duncan in the March 2008 "SLAM-UP" centerfold for "SLAM Magazine". Wallace suffered a Grade 3 concussion on February 23, 2008 after taking an unintentional elbow