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“Galapagos Tortoises and Evolution.” AMNH, www.amnh.org/exhibitions/lonesome-george/galapagos-tortoises-and-evolution/. Accessed 6 Sept. 2017
“BCB705 Biodiversity: Chapter2 - Evolution of Biodiversity.” Darwin and the Giant Tortoises, 19 Apr. 2006, planet.uwc.ac.za/nisl/biodiversity/loe/page_02.htm.
Schoch, Rainer R. Triassic Stem Turtle. www.nature.com/nature/journal/v523/n7562/full/nature14472.html.
Nuwer, Rachel. “This Ancient Creature Shows How the Turtle Got Its Shell.” Smithsonian.com, Smithsonian Institution, 24 June 2015, www.smithsonianmag.com/science-nature/ancient-creature-shows-how-turtle-got-its-shell-180955688/.
Saddleback
Domeshaped
Charles Darwin
Cretaceous: Pre-extinction
Cenozoic: 55 million years ago - present
Triassic: 250 million years ago
Triassic: 210 million years ago
Cretaceous: 110 million years ago
Triassic: 220 million years ago
Cretaceous/Paleocene
They survived!
Their protective shells, slow metabolism, and semi-aquatic habitat protected them from extinction.