DIGITAL IMAGES - top of page working downward and clockwise: "Hand Drawn Biology On A Chalkboard." Shutterstock. Bimbim, 2013. Web. 2016. Lohmann, Kenneth J. "Sea Turtles: Navigating with Magnetism." Current Biology. Cell.com, 6 Feb. 2007. Web. 20 Aug. 2016.
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