Works Cited
Bagley, Mary. "Precambrian: Facts about the Beginning of Time." http://www.livescience.com/43354-precambrian-time.html. Purch, 12 Feb. 2014. Web. 11 Nov. 2014.
"The Cenozoic Era." scienceviews. Calvin & Rosanna Hamilton, n.d. Web. 19 Nov. 2014.
Pappas, Stephanie. "Paleozoic Era: Facts & Information." live science. N.p., 19 June 2013. Web.
PBS. WGBH Educational Foundation and Clear Blue Sky Productions, Inc., 2001. Web. 5 Dec. 2014.
16 Nov. 2014.
ScinceViews. Calvin & Rosanna Hamilton, n.d. Web. 5 Dec. 2014.
Bagley, Mary. "Precambrian: Facts about the Beginning of Time." http://www.livescience.com/43354-precambrian-time.html. Purch, 12 Feb. 2014. Web. 11 Nov. 2014.
"The Cenozoic Era." scienceviews. Calvin & Rosanna Hamilton, n.d. Web. 19 Nov. 2014.
Pappas, Stephanie. "Paleozoic Era: Facts & Information." live science. N.p., 19 June 2013. Web.
PBS. WGBH Educational Foundation and Clear Blue Sky Productions, Inc., 2001. Web. 5 Dec. 2014.
16 Nov. 2014.
ScinceViews. Calvin & Rosanna Hamilton, n.d. Web. 5 Dec. 2014.