A brief account of achievements of muslim scientists in development of scientific history is given by the author. After going through this brief account of glorious achievements of Muslim scientists it is felt that the tree of science and technology has taken its roots in the Islamic World which if properly nourished and protected would soon turn this dry land into a green Valley of knowledge, wisdom and power. It is very well said that Dark Ages are not the periods when light can not enter but these are the Ages when people refuse to see the light.