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
Define the Great Line 200 since 1997. The title of the album, according to keyboardist Christopher Dudley, comes from "defining that line for yourself between becoming the man or the woman that you want to be and the man or the woman other people want you to be." "Alternative Press" used the title as an example of how on this album Underoath seemed "acutely aware of the line that separates their spiritual core from the painful reality of being human," and how "even successful musicians need help staying on the right side of that line." Unlike "They're Only Chasing Safety", "Define the Great Line"