The following is a list of the references and citations with clickable links to save you time:

  1. Bianconi, E., Piovesan, A., Facchin, F., Beraudi A., Casadei, R., Frabetti F., Vitale L., Pelleri, M., Tassani, S., Piva, F., Perez-Amodio, S., Strippoli, P., & Canaider, S. (2013). An estimation of the number of cells in the human body. Annals of Human Biology, 40(6), 463─471. PMID: 23829164 – DOI: 10.3109/03014460.2013.807878
  2. Ladoukakis E. D., & Eyre-Walker, A. (2004). “Evolutionary genetics: direct evidence of recombination in human mitochondrial DNA”. Heredity, 93(4), 321. PMID 15329668 –DOI:10.1038/SJ.HDY.6800572
  3. Sagan, L. (1967). On the origin of mitosing cells. Journal of Theoretical Biology, 14(3), 225─274. PMID: 11541392 – DOI: 10.1016/0022-5193(67)90079-3
  4. Brockman, J. (1995). Gaia Is a Tough Bitch. New York City: Simon & Schuster. Retrieved from
  5. Shukla, V., Mishra, S. K., & Pant, H. C. (2011). Oxidative stress in neurodegeneration. Advances in pharmacological sciences, 2011, 572634. PMID: 21941533 – DOI: 10.1155/2011/572634
  6. Pham-Huy, L. A., He, H., & Pham-Huy, C. (2008). Free radicals, antioxidants in disease and health. International Journal of Biomedical Science (IJBS), 4(2), 89─96. PMID: 23675073 – Retrieved from
  7. Zahrt, O. H., & Crum, A. J. (2017). Perceived physical activity and mortality: Evidence from three nationally representative US samples. Health Psychology, 36(11), 1017─1025. PMID: 28726475 – DOI: 10.1037/HEA0000531

If you find any dead links or have comments on the resources please get in touch