Evolution of Cancer
Human body has 1014 cells descended from a single egg cell.
Many mutations occur in cells over lifetime.
Mutations that favor the growth of an individual cell over the growth of an organism lead to cancer.
A half-dozen genes must be disable to have a full fledged malignant cancer.
Cancer cells have mutations that encourage mutation – flawed DNA repair mechanisms.
Radiation paradoxically induces cancer and cures it.