Works citied
Gaherty, Geoff. "Vernal Equinox Marks First Day of Spring Today." Scientific American Global RSS. N.p., 20 Mar. 2013. Web. 28 Sept. 2014.
URL
http://www.scientificamerican.com/article/vernal-equinox-marks-first-spring/
Gaherty, Geoff. "Vernal Equinox Marks First Day of Spring Today." Scientific American Global RSS. N.p., 20 Mar. 2013. Web. 28 Sept. 2014.
URL
http://www.scientificamerican.com/article/vernal-equinox-marks-first-spring/