Could Titans Produce Enough Energy to Sustain Themselves?

Luke Willcocks


This paper discusses whether or not Titans could produce enough energy photosynthetically to sustain themselves, and thus whether they could survive. It was found that the Titans always produced below 20% of the energy that they would require, through photosynthesis alone, regardless of the Titan’s size. This suggests the Titans must have another energy source alongside photosynthesis. Beware possible spoilers for Attack on Titan season 1 and 2.


Comic; TV programme; Biology; Photosynthesis; Metabolism; Attack on Titan; Anime

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Isayama, H. (2010) Attack on Titan, Japan: Kodansha America Inc.

Attack on Titan Wiki (2014) Titans Forest of Giant Trees, 10 October 2014. [Online]. Available at: [Accessed 22 February 2017].

Douglas, C., Lawrence, J., Bush, N., Oster, R., Gower, B. & Darnell, B. (2008) Ability of the Harris Benedict formula to predict energy requirements differs with weight history and ethnicity, Nutrition Research, vol. 27, no. 4, pp. 194-199.

Harris, A. & Benedict, F. (1918) A biometric study of human basal metabolism, Proceedings of the National Academy of Sciences, vol. 4, no. 12, pp. 370-373.

Chester, A. (2014) The Obesity Paradox: Heavy and Healthy, 13 August 2014. [Online]. Available at: [Accessed 13 March 2017].

Web MD (2017) Weight Loss and Body Mass Index, 17 January 2017. [Online]. Available at: [Accessed 13 March 2017].

Berg, J., Tymoczko, J. & Stryer, L. (2002) Biochemistry, New York: W H Freeman.

Freedman, R. & Kaufmann, W.J. (2007) Universe, 8th ed., W. H. Freedman and Company, New York.

Mosteller, R.D. (1987) Simplified calculation of body-surface area, The New England Journal of Medicine, vol. 317, no. 17, p. 1098.


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