Emory University provided the topographic map http://www.law.emory.edu/PI/GALAPAGOS/MapsFrameset.html  http://www.law.emory.edu/PI/GALAPAGOS/images/topographic.jpeg

Galapagos Adventures provided climograph data http://www.galapagosadventures.com/page22.html

Kouvatas, A.  et.al., 2002. El Niño-Like Pattern in Ice Age Tropical Pacific Sea Surface Temperature. Science 297(5579) 226-230.

Sinton, C. 1992. The Evolution of the Galapagos Platform: Results from Radiometric Dating and Experimental Petrology.

WM7D azimuthal map project  http://www.wm7d.net/azproj.shtml

Tortoise and environment provided by:
http://www.arkive.org/species/GES/reptiles/Geochelone_spp/GES006350.html

Photos of wildlife provided by
http://www/worldwildlife.org/galapagos/tortoise.cfm

Biography of Giant Tortoise and Iguanas provided by:
http://www.galapagosonline.com/Galapagos_Natural_History/Birds_and_Animals/Animals/Tortoises.html