Citations

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⁴ Cornell University. (2005, June 2). Lactose Intolerance Linked to Ancestral Environment. ScienceDaily. Retrieved May 6, 2010, from http://www.sciencedaily.com/releases/2005/06/050602012109.htm

⁵ University College London. (2009, September 1). Milk Drinking Started Around 7,500 Years Ago in Central Europe. ScienceDaily. Retrieved May 6, 2010, from http://www.sciencedaily.com/releases/2009/08/090827202513.htm.

⁶ United States Environmental Protection Agency. (2008). Acid Rain. Retrieved May 8, 2010 from http://www.epa.gov/acidrain/index.html.

⁷ National Oceanic and Atmospheric Administration. (2009). An Introduction to Ocean Acidification. Retrieved May 9, 2010 from http://coralreefwatch.noaa.gov/satellite/oa/description/oaps_intro_oa.html.

⁸ National Science Foundation. (2007, April 12). Tyrannosaurus rex and Mastodon Protein Fragments Discovered, Sequenced. ScienceDaily. Retrieved May 12, 2010, from http://www.sciencedaily.com/releases/2007/04/070412140942.htm.

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¹⁰ Asara, J.M., Schweitzer, M.H. Freimark, L.M., Phillips, M., & Cantley, L.C. (2007). Protein Sequences from Mastodon and Tyrannosaurus rex Revealed by Mass Spectrometry. Science 316 (5822), 280-285.

¹¹ Beth Israel Deaconess Medical Center. (2009, May 1). Dinosaur-Bird Link: Ancient Proteins Preserved in Soft Tissue from 80 Million-Year-Old Hadrosaur. ScienceDaily. Retrieved May 12, 2010, from http://www.sciencedaily.com/releases/2009/04/090430144528.htm.