An early infection holds thousands of bacteria, and in the body each one divides into two daughter cells every few hours.

FORBES: Germ Warfare

Crucially, these changes are generally passed on to the daughter cells produced when a cell divides, and are thus perpetuated throughout an animal's life.

ECONOMIST: Social status and health

This done, they implant the daughter cells back into damaged areas.

ECONOMIST: Something new in mind

He uses stem cells to study juvenile diabetes (his son and daughter have it), turning to the foundation of another billionaire--the late Howard Hughes.

FORBES: Magazine Article