…ar Range on the west (Laguna or Jacumba Mountains), to the Traverse Ranges (see Wikipedia) and the Mojave Desert/Coachella Valley in the north, to western edge of Arizona in the east, and the Colorado River delta at the Sea of Cortez in the south. It is a subset of the vast Sonor…

… Charles Robert Darwin (1809–1882) Figure 2. Joseph Augustin Hubert de Bosquet (Wikimedia Commons). (1814–1880) (Archives Natuurhistorisch Museum Maastricht, Maastricht). the area, exchanged eleven letters with Darwin on the subject of cirripedes between December 17, 1852, and ea…

…process. This process is doubly collaborative in user-generated systems such as Wikimedia, where online help is under constant revision, positioning users as au- thors and editors of crowd-sourced documentation. If technical and professional Foreword xv communication seems more f…