Prof Gavril Abramovich Ilizarov (1921-1992) was a doctor working in Kurgan Siberia of erstwhile USSR. He was not trained as a surgeon but he faced a wide variety of orthopedic problems. In those primitive conditions in 1950s he devised and developed a circular external fixator and his research led him to the techniques of bone lengthening. The theory is known as “tension stress or distraction histiogenesis. In simple words when a tissue is stretched in controlled manner new tissue like bone, muscle, artery and nerve is formed. He was a self taught orthopedic surgeon who created a magical principle which has revolutionized the treatment of non unions infected non unions and limb lengthening