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  • Cobb, Samuel. "The facial skeleton of the chimpanzee-human last common ancestor." Journal of Anatomy. April 1, 2008.
  • "DNA analysis for chimpanzees and humans reveals striking differences in genes for smell, metabolism and hearing." Cornell News. Dec. 18, 2003. (April 24, 2009)http://www.news.cornell.edu/releases/Dec03/chimp.life.hrs.html
  • "Evolution's human and chimp twist." BBC News. May 18, 2006. (May 11, 2009)http://news.bbc.co.uk/2/hi/science/nature/4991470.stm
  • "First chimpanzee fossils found." BBC News. Aug. 31, 2005. (May 8, 2009)http://news.bbc.co.uk/2/hi/science/nature/4201666.stm
  • McBrearty, Sally and Nina Jablonski. "First fossil chimpanzee." Nature. Sept. 1, 2005. (May 8, 2009)http://www.ncbi.nlm.nih.gov/pubmed/16136135
  • U.C. Berkeley Middle Awash Project. (May 7, 2009)http://middleawash.berkeley.edu/middle_awash.php