Bibliography (15):

1. De novo evolution of macroscopic multicellularity

2. The reserve-capacity hypothesis: evolutionary origins and modern implications of the trade-off between tumor-suppression and tissue-repair

3. Emergent multilevel selection in a simple spatial model of the evolution of altruism

4. Nothing in evolution makes sense except in the light of parasites

5. Understanding the Odd Science of Aging

6. Somatic evolution and global expansion of an ancient transmissible cancer lineage

7. PATH: Defining ancestry, heritability and plasticity of cellular phenotypes in somatic evolution

8. Erosion of the Epigenetic Landscape and Loss of Cellular Identity as a Cause of Aging in Mammals

9. Wikipedia Bibliography:

   1. Group selection

   2. https://en.wikipedia.org/wiki/Cancer  :

      https://en.wikipedia.org/wiki/Cancer

   3. Somatic evolution in cancer

   4. https://en.wikipedia.org/wiki/Multicellular_organism  :

      https://en.wikipedia.org/wiki/Multicellular_organism

   5. https://en.wikipedia.org/wiki/Tree_of_life_(biology)  :

      https://en.wikipedia.org/wiki/Tree_of_life_(biology)

   6. https://en.wikipedia.org/wiki/Cell_proliferation  :

      https://en.wikipedia.org/wiki/Cell_proliferation

   7. https://en.wikipedia.org/wiki/Cell_death  :

      https://en.wikipedia.org/wiki/Cell_death