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 of beauty with straight lines, parallel lines, or right-angled intersecting lines, which signify stasis, death, or inanimate objects. In contrast to grand compositional lines, which are regularly found in Baroque or Rococo art, the serpentine line is not primarily dictating the whole composition of a canvas. Instead, the line should be understood as being found in parts; a composition is created by employing various kinds of lines in various relations to each other without destroying its simplicity. Line of beauty Line of beauty is a term and a theory in art or aesthetics used to describe an S-shaped curved line (a serpentine