Wallace Line by the Sahul Shelf to New Guinea. The biogeographic boundary known as Lydekker's Line, which separates the eastern edge of Wallacea from the Australian region, has a similar origin to the Wallace line. During ice age glacial advances, when the , both Asia and Australia were united with what are now islands on their respective continental shelves as continuous land masses, but the deep water between those two large continental shelf areas was, for over 50 million years, a barrier that kept the flora and fauna of Australia separated from those of Asia. Wallacea consists of islands that were not
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