These are the sources and citations used to research Extraterrestrial Life. This bibliography was generated on Cite This For Me on
Your Bibliography: Lissauer, Jack. "Habitable Zone Britannica School." School.eb.co.uk. N.p., 2015. Web. 23 Feb. 2015.
Your Bibliography: Malik, Tariq. "Primitive Alien Life May Exist, Stephen Hawking Says." Space.com. N.p., 2008. Web. 23 Feb. 2015.
In-text: (Petigura, Howard and Marcy 19273-19278)
Your Bibliography: Petigura, E. A., A. W. Howard, and G. W. Marcy. "Prevalence Of Earth-Size Planets Orbiting Sun-Like Stars." Proceedings of the National Academy of Sciences 110.48 (2013): 19273-19278. Web. 23 Feb. 2015.
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