Ancient Indian Scientist
India is recognized as a symbol of Culture, Traditions, Customs, Peace and a Spiritual Centre. The World does not credit India for its contribution in the fields of science and technology, even people of this country know very little about it. However, in recent decade’s world has slowly started to recognize what were the contributions of Indians.
Indian has some of the oldest universities in the world, students from other countries traveled to study there.
It is of great importance to know the scientists who have greatly contributed and influenced science, technology and medicine knowledge which is now offering light to the world in many discoveries and innovations.
S.No  Scientist  Period  Field  Titles  Contribution 
1  Susruta  600 BCE  Medicine, Plastic Surgery, Dentistry, Obstetrics and Gynecology  Father of Plastic Surgery 
Susruta is considered pioneer in the field of surgery. He was first to study human anatomy using dead bodies. He quoted “surgery is the highest division of the healing arts and least liable to fallacy”. He wrote a book based his study “Susruta Samhita”, the book covers over 1100 diseases, including fevers of twentysix kinds, jaundice of eight kinds and urinary complaints of twenty kinds. Over 760 plants are described and which parts of the plant to be used for treatment. Household remedies were suggested by him which included cinnamon, sesame, peppers, He also explained the method of selecting and preserving a dead body for the 
2  Charaka  300 BCE  Medicine  Father of Medicine 
Charka was the Raj Vaidya (royal doctor) in the court of Kanishka. He wrote a book “Charaka Samhita” which has the description of a large number of diseases and gives methods of identifying their causes as well as the method of their treatment. Charaka also discussed Genetics. He spoke importance of digestion, metabolism, and immunity. In Charaka Samhita, more stress has been laid on removing the cause of disease rather than simply treating the illness. 
3  Boudhayana  8 – 7 Centuries BCE  Mathematician  Father of Mathematics 
Baudhayan’s work in the field of mathematics was well ahead of western world. He invented many concepts in mathematics. Baudhayan calculated the value of “pi”, which is one of the most discussed 
4  Kanad  6 – 2 Centuries BCE  Astronomy and Philosophy 
Aulukya famous as Kanad established Vaisheshika School, one of the six systems of Indian philosophy. It is said that because of his interest in minute particles “Kana” since childhood he got that name. Kanad has given the theory of universe being made up of Kanas (atom) which are invisible to naked eye, a kana cannot be subdivided and are indestructible. 

5  Mahaviracharya  9 CE A.D  Mathematician 
Mahaviracharya was a Jain Guru, he wrote “Ganith Sara Sangraha” in 850 A.D. which dealt with Arithmetic. Various Jain literature has elaborate mathematics concepts which explained how to solve quadratic equations, concepts of fractions, number series, logarithms, set theory, algebra, etc. long before western world invented LCM method, Mahaviracharya discussed it in his book. 

6  Nagarjuna  150 – 250 A.D  Metallurgist 
Nagarjuna was famous for his experiments which were to transform base elements into gold, in western world such experiment are known as alchemy. He succeeded in making an element with goldlike shine it is used in making imitation jewelry. Nagarjuna also explained methods to extract metals like gold, silver, tin and copper in his book “Rasaratnakara”. 

7  Patanjali  400 A.D  Medicine and Yoga 
Healing without use of medicine is the science of Yoga developed in ancient India, it is an allied science of Ayurveda which treats with use of herbs and plants. Yoga focuses on healing at physical and mental level by detaching the inner self from outer subjects of senses, physical exercise and mudras help in getting rid of ailments. Vedas are the source for yoga. Meditation is important aspect of yoga it sets in to Physical yoga is called “Hath Yoga” and mental yoga is called “Raja Yoga”. Acharya Patanjali is credited to conceptualize “yoga sutras”, it refers to “Aum” as 

8  Aryabhatta  476 – 550 A.D  Mathematics and Astronomy 
Aryabhatta is most famous of all the Indians for the discoveries and work in field of Mathematics and Astronomy. Aryabhatta wrote a book “Aryabhattiya”, which dealt with mathematics. In his book, Aryabhatta discussed Number Theory, Geometry, Trigonometry, and Algebra. The book “Khagol Shastra” in the field of astronomy has great contributions from Aryabhatta. 

9  Varahamihira  505 – 587 A.D  Astronomy, Mathematics and Astrology 
Varahamihira lived in the Gupta Period, his contributions were mainly in the fields of Hydrology, Geology, and Ecology. He was the first to state that termites and plants would indicate the presence of water underground. He has enlisted 30 plants and 6 animals whose presence would indicate water. “Brhat Samhita” is the work about earthquakes theory in which he explains signs of Varahamihira also made a contribution to astrology, his explanations were backed with 

10  Brahmagupta  598 – 670 A.D  Mathematics and Astronomy 
Brahmgupta’s contribution in mathematics took it to heights far beyond others. Modern day multiplication is his contribution. He introduced negative numbers and operations on zero. Arabs took his book “Brahm Sputa Siddantika” as reference to understand our 

11  Bhaskaracharya  1114 – 1185 A.D  Mathematics 
Bhaskaracharya wrote the book “Siddanta Shiromani” which discussed about 4 mathematics concepts Arithmetic (Lilavati), Algebra (Beejaganit), Sphere (Goladhyaya) and Mathematics of Planets (Grahaganit). Bhaskaracharya introduced “Chakrawat” the Cyclic Method to solve algebraic equations. 
Listed above are few of them. Many people have contributed to science and technology and other fields. Motto of development was not to cause any harm to nature as well as humans in physical and psychological way. coexistence with nature was priority.