Holt, Jim. "The Existence of Alternate Universes." My So Called Universe. The New Yorker, 20 Aug. 2003. Web. 19 Apr. 2015.
Redd, Nola Taylor. "Black Holes: Facts, Theory & Definition." What Is a Black Hole. Space.com, 9 Apr. 2015. Web. 19 Apr. 2015.
Northwestern University. "Space Environment." Why Do Mass and Distance Affect Gravity? Northwestern University, n.d. Web. 19 Apr. 2015.
Perimeter Institute for Theoretical Physics. "Our Universe May Have Emerged from a Black Hole in a Higher Dimensional Universe." SciTech Daily. Perimeter Institute, 08 Aug. 2014. Web. 19 Apr. 2015.
Chu, Jason. "Parallel Universes and the Many-Worlds Theory." Universe Today. Scientific American, 15 Aug. 2014. Web. 19 Apr. 2015.
Kaku, Michio. Parallel Worlds: Creation, Superstrings, and a Journey through Higher Dimensions. New York: Doubleday, 2004. Print.
Douglas, Michael R., et al. "D-branes and short distances in string theory."Nuclear Physics B 485.1 (1997): 85-127.
Bousso, Raphael, and Ben Freivogel. "A paradox in the global description of the multiverse." Journal of High Energy Physics 2007.06 (2007): 018.
Redd, Nola Taylor. "Black Holes: Facts, Theory & Definition." What Is a Black Hole. Space.com, 9 Apr. 2015. Web. 19 Apr. 2015.
Northwestern University. "Space Environment." Why Do Mass and Distance Affect Gravity? Northwestern University, n.d. Web. 19 Apr. 2015.
Perimeter Institute for Theoretical Physics. "Our Universe May Have Emerged from a Black Hole in a Higher Dimensional Universe." SciTech Daily. Perimeter Institute, 08 Aug. 2014. Web. 19 Apr. 2015.
Chu, Jason. "Parallel Universes and the Many-Worlds Theory." Universe Today. Scientific American, 15 Aug. 2014. Web. 19 Apr. 2015.
Kaku, Michio. Parallel Worlds: Creation, Superstrings, and a Journey through Higher Dimensions. New York: Doubleday, 2004. Print.
Douglas, Michael R., et al. "D-branes and short distances in string theory."Nuclear Physics B 485.1 (1997): 85-127.
Bousso, Raphael, and Ben Freivogel. "A paradox in the global description of the multiverse." Journal of High Energy Physics 2007.06 (2007): 018.
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