Stephen Hawking is a great scientist. He was born in 1942 in an educated family in United States of America.Hawking is considered the greatest physicist after Einstein.He got married at the age of 21 in1963. He was skilled in Mathematics since his childhood. As a victim of Gehrig's disease he was confined to the wheelchair in 1972 with no power to control his body except for some limited movement of his head and hands only.He can not communicate with people.He lives with his wife and three daughters. An American organisation provides him with 24 hours nursing facilities. 