41.   Soon healthy cells became cancerous.

42.   The cells become hyperactive, as if constantly pumped with adrenaline, and devour the chemicals they store for energy.

43.   They later found that donor cells had become part of the blood, marrow, spleen, lung, liver and intestine.

44.   When telomeres wear out, cells become vulnerable and the stage is set for diseases of aging, including cataracts and arthritis.

45.   When the cells become stable, the brain establishes long-term memories.

46.   This cellular self-destruct mechanism might be made inactive through genetic mutation, which could explain why some prostate cells become cancerous, the scientists said.