The eminent scientist who ushered India into the atomic age was Dr. Homi Jehangir Bhabha. He was born on 30 October 1909 in a Parsi family of Mumbai. He is called the 'Father of Indian Nuclear Science'.

Dr.Bhabha was appointed the first chairman of the Atomic Energy Commission, set up in 1948. It was largely due to his efforts that the nation's first Atomic research Center, now named Bhabha Atomic research Center, was established at Trombay, near Mumbai. Under his expert guidance the nation's first atomic reactor 'Apsara' was also commissioned in 1956. In 1945, he founded the Tata Institute of Fundamental Research in Mumbai.

Dr.Bhabha had a highly distinguished career and was an exceptionally bright student. Even as a student, he made some fundamental discoveries in electricity, magnetism, quantum theory and the cosmic rays.

Dr.Bhabha as the scientist of a very high caliber, received many national and international awards and honours. In 1942, he was awarded the 'Adams' award. In 1951, Bhabha was elected the president of the Indian Science Congress. In 1955, he was elected the chairman of the U.N. sponsored International conference on the peaceful uses of the atomic energy held in Geneva. The Government of India also honoured him with 'Padma Bhushan' in 1954. The 'Homi Jehangir Bhabha Award' has been instituted by Indian National Science Academy. He passed away in 1966 in a plane crash.

Dr. Hargobind Khorana was born on 9th January 1922 at Raipur, Punjab (now in Pakistan). Dr.Khorana was responsible for producing the first man-made gene in his laboratory in the early seventies. This historic invention won him the Nobel Prize for Medicine in 1968 sharing it with M.W. Nuremberg and R.W. Holley for interpreting the genetic code and analyzing its function in protein synthesis. They all independently made contributions to the understanding of the genetic code and how it works in the cell.

Khorana, born into a poor family attended D.A.V. High School in Multan, took his M.Sc from Punjab University at Lahore and in 1945 he went to England on a government scholarship and obtained a PhD from the University of Liverpool (1948). Dr. Khorana spent a year in Zurich in 1948-49 as a post-doctoral fellow at the Swiss Federal Institute of Technology and returned to India for a brief period in 1949. He returned to England in 1950 and spent two years on a fellowship at Cambridge and began research on nucleic acids under Sir Alexander Todd and Kenner. His interest in proteins and nucleic acids took root at that time. In 1952 he went to the University of British Columbia, Vancouver on a job offer and there a group began to work in the field of biologically interesting phosphate esters and nucleic acids with the inspiration from Dr. Gordon M. Shrum and Scientific counsel from Dr. Jack Campbell. In 1960 he joined the University of Wisconsin as Professor and co-Director of the Institute of Enzyme Research and Professor of Biochemistry (1962-70) and became an US citizen. Khorana continued research on nucleic acid synthesis and prepared the first artificial copy of a yeast gene. Dr. Khorana is also the first to synthesize oligonucleotides, that is, strings of nucleotides. These custom designed pieces of artificial genes are widely used in biology labs for sequencing, cloning and engineering new plants and animals. The oligo nucleotides, thus, have become indispensable tools in biotechnology. In 1970 he became the Alfred Sloan Professor of Biology and Chemistry at the Massachusetts Institute of Technology, USA. Khorana now settled in America, is married to Esther Elizabeth Sibler from Switzerland and they have three children.

Apart from the Nobel Prize, Khorana has won many awards and honors for his achievement. Distinguished Service Award, Watumull Foundation, Honolulu, Hawaii (1968); American Academy of Achievement Award, Philadelphia, Pennsylvania (1971); Padma Vibushan, Presidential Award, India (1972); J.C.Bose Medal, Bose Institute, Calcutta (1972) and Willard Gibbs medal of the Chicago Section of American Chemical Society (1973-74). He was elected a member of the National Academy of Sciences, Washington as well as a Fellow of the American Association for the Advancement of Science. In 1971 he became a foreign member of USSR Academy of Sciences and in 1974 an Honorary Fellow of the Indian Chemical Society.

Khorana's work, which is an important scientific landmark of the twentieth century, has brought closer the day when synthetic DNA may be introduced into the defective human tissues to bring about their repair or treat mentally retarded people and change them into more intelligent and healthy human beings. His synthesis of RNA, capable of replication in laboratory, is a step towards the creation of life artificially. In fact, the researches has opened up a new branch called Genetic Engineering in Science.

Jagadish Chandra Bose was one of the pioneers of modern science in India. His research was on the properties of electro-magnetic waves. His major achievement was to demonstrate the similarity of responses to stimulation among the living and the nonliving as well as the fundamental similarity of responses in plant and animal tissues. The British Government knighted him in 1917. He founded the 'Bose Research Institute' in Kolkatta in 1917.

Bose was not only a biologist, but also a physicist. Bose believed that by focusing on the boundaries between different physical and biological sciences, he would be able to demonstrate the underlying unity of all things. Bose's biological researches were founded initially by the discovery that an electric receiver seems to show science of fatigue after continued use. He can rightly be called the inventor of wireless telegraphy. Bose was the first in the world to fabricate and demonstrate in public (1985) the device that generated microwaves-radio waves of very short wave length. But his invention was not patented before Guglielmo Marconi (1896) who became internationally recognised as the inventor.

After completing his studies in London, Bose return to Kolkatta and was appointed Professor at Presidency College in Kolkatta. Then he became the director of the institute he founded and remained in the post till his death on 23rd November 1937.

Meghnad Saha, one of the famous Physicist was born in Saroyatali village in Dacca (now in Bangladesh). He invented an instrument to measure the weight and pressure of solar rays. He produced the famous equation which he called 'equation of the reaction - isobar for ionization' which later became known as Saha's "Thermo-Ionization Equation".

Saha was the leading spirit in organizing the scientific societies like the 'National Academy of Science' (1930), 'Indian Institute of Science' (1935) and the 'Indian Association for the Cultivation of Science' (1944). The lasting memorial to him is the 'Saha Institute of Nuclear Physics' founded in 1943 in Calcutta. He was the chief architect of river planning in India. He prepared the original plan for Damodar Valley Project.

Subrahmanyan Chandrasekhar, a Nobel Laureate in Physics and one of the greatest astrophysicists of modern times was born on October 19, 1910 in Lahore, (now in Pakistan) to parents Chandrasekhara Subrahmanya Ayyaa civil servant and Sita Balakrishnan. Being the nephew of the great, C.V. Raman, a Nobel Prize winner in Physics young Chandrashekhar's interest in the subject came naturally to him.

In 1930, at the age of 19, he completed his degree in Physics from Presidency College, Madras and went to England for postgraduate studies at the Cambridge University. Chandrasekhar was noted for his work in the field of stellar evolution, and in the early 1930s he was the first to theorize that a collapsing massive star would become an object so dense that not even light could escape it; now known as the Black hole. He demonstrated that there is an upper limit ( known as 'Chandrasekhar Limit' ) to the mass of a White dwarf star. His theory challenged the common scientific notion of the 1930s that all stars, after burning up their fuel, became faint, planet-sized remnants known as white dwarfs. But today, the extremely dense neutron stars and black holes implied by Chandrasekhar’s early work are a central part of the field of astrophysics.

Initially his theory was rejected by peers and professional journals in England. The distinguished astronomer Sir Arthur Eddington publicly ridiculed his suggestion that stars could collapse into such objects( black holes). Disappointed, and reluctant to engage in public debate, Chandrasekhar moved to America and in 1937 joined the faculty as an Assistant Professor of Astrophysics at the University of Chicago and remained there till his death. At Chicago, he immersed himself in a personalized style of research and teaching, tackling first one field of astrophysics and then another in great depth. He wrote more than half a dozen definitive books describing the results of his investigations. More than 100,000 copies of his highly technical books have been sold. He also served as editor of the Astrophysical Journal, the field’s leading journal, for nearly 20 years; presided over a thousand colloquia; and supervised Ph.D. research for more than 50 students.

Chandrasekhar was a creative, prolific genius whose ability to combine mathematical precision with physical insight changed humanity's view of stellar physics. In addition to his work on star degeneration, he has contributed significantly to many disparate branches of physics, including rotational figures of equilibrium, stellar interiors, radiative transfer of energy through the atmospheres of stars, hydro magnetic stability and many others. He won the Nobel Prize in 1983 and received 20 honorary degrees, was elected to 21 learned societies and received numerous awards in addition to the Nobel Prize, including the Gold Medal of the Royal Astronomical Society of London; the Royal Medal of the Royal Society, London; the National Medal of Science, the Rumford Medal of the American Academy of Arts and Sciences; and the Henry Draper Medal of the National Academy of Sciences. NASA's premier X-ray observatory was named the Chandra X-ray Observatory in his honor.

He and his wife, Lalitha became American citizens in 1953. This genius passed away on 21 August 1995 in Chicago, Illinois, USA..

Shakuntala Devi is generally known as a 'Human Computer' because of her extraordinary talents in solving complex mathematical problems without any mechanical aid. She also found her place in the Guinness book of records as a result of her extraordinary talents. Nowadays, apart from solving mathematical problems, she is utilising her amazing talent in the field of astrology.

She was born in 1939 in Bangalore, Karnataka. Manifested with an extraordinary love for numbers at the age of 3, she became an expert in complex mental arithmetic at the age of five. On 18 June 1980, Shakuntala Devi gave the product of two, thirteen digit figures after multiplying them within 28 seconds. Many countries have invited Shakuntala Devi to demonstrate her extraordinary talent. Today, she is acclaimed as an accomplished mathematician.

Dr. Shanti Swaroop Bhatnagar is known as 'The Father of Research Laboratories'. He is remembered for having established various chemical laboratories in the country.

He was born in Bera, Punjab. After completing his M.Sc in India he went to England on a fellowship. On his return he served as a professor in Benaras Hindu University. He used to spent all his spare time in his laboratory doing research.

He was awarded the title 'Sir' by the British in recognition of his service to Science, in 1941. As Nehru was much in favour of scientific development after Independence, Council of Scientific and Industrial Research was set up under the chairmanship of Dr. Bhatnagar. Later, he was awarded 'Padma Bhushan'. He became the first director-general of the Council of Scientific and Industrial Research (CSIR) in 1940. After his death, CSIR established a Bhatnagar Memorial award for eminent scientists in his honour.