Venkatesh Bapuji Ketkar (1854-1930)
The last great astronomer in the Siddhanta lineage of Aryabhata, Bhaskara & Madhava. He predicted with remarkable calculations the existence of the 9th planet in 1911 before Clyde Tombaugh discovered Pluto in 1930. he predicted many orbital parameters of Pluto. Bapuji’s calculations were better than those of Percival Lowell & Henry Pickering who are still honored. He published in May 1911 issue of Bulletin of Astronomical Society of France http://worldcat.org/identities/lccn-n89166561/. Before Clyde announced the discovery of Pluto in Feb 1930, Bapuji died of a severe paralytic stroke. As a typical westerner, and it’s “independent discovery”, it will be said that Clyde did not know of Ketkar and that he used only the work of his western predecessors!
Read more: https://rajeshkochhar.com/data/publications/historicalperspective.pdf
Bibha Chowdhuri (1913-1991)
He was an outstanding physicist who works never got the recognition whereas people like CF Powel who reproduced her works got Nobel for it. She obtained her MSc in Physics from Calcutta University in 1936 — the only woman in that batch — and plunged headlong into research, mostly at the Bose Institute. Debendra Mohan (DM) Bose [nephew of Sir J.C. Bose] and Chowdhuri published three consecutive papers in Nature, but could not continue further investigation on account of “non-availability of more sensitive emulsion plates during the war years. Seven years after this discovery of mesons by DM Bose and Bibha Chowdhuri, C.F. Powell made the same discovery of pions and muons and further decay of muons to electrons… using the same technique” and won the Nobel Prize in 1950. Powell acknowledged Bose and Chowdhuri’s pioneering contribution in his work.
She was one of the young scientists — the first woman researcher — selected by Homi J. Bhabha to join the newly established Tata Institute of Fundamental Research (TIFR), Bombay, in 1949. Chowdhuri (1913-1991) served in renowned institutions of the country and was a tireless researcher till she died, unsung and unheralded, in Calcutta. No national award or fellowship of any major scientific society came her way. She does not figure among the 98 scientists of uneven quality in the 2008 book Lilavati’s Daughters: The Women Scientists of India, edited by Rohini Godbole and Ram Ramaswamy and published by the Indian Academy of Sciences, Bangalore.
In her introduction to the book Women and Science in India: A Reader,a collection of interesting essays, Neelam Kumar states that “science continues to be characterised by low number of females, clustered in disciplines considered feminine and confined to the ranks of invisible, poorly paid assistants, and other lower positions.” In the same volume, Namrata Gupta and A.K. Sharma write about the “triple burden” —- In addition to the double burden of career and home, the long hours in the laboratory demanded by scientific study and research constitutes the third burden — faced by women in science. The issue of “passive discrimination” and of invisible barriers are also no less important.
Originally known as star HD 86081 was renamed as Bibha in 2019 by International Astronomical Union in the honour of Indian physicist Bibha Chowdhuri.
Read more: https://www.telegraphindia.com/amp/science-tech/the-woman-who-could-have-won-a-nobel/cid/1676488
G.S. Ramaswamy (1923–2002): The Ghost Who Shaped Modern Structure
G.S. Ramaswamy didn’t build with more material — he built with better physics. While engineers piled on steel and concrete, he used the mathematics of curvature to create structures as thin as an eggshell and as strong as stone.
Trained at Caltech during its golden age, Ramaswamy saw buildings not as bricks and mortar, but as stress-strain fields. Obsessed with how nature bears load — how an eggshell resists crushing simply through shape — he pioneered the Funicular Shell: roofs designed along catenary curves, paper-thin yet structurally formidable, requiring a fraction of conventional material.
He founded the Structural Engineering Research Centre (SERC) and made India a global leader in shell structures decades before the West caught on. His book, Design & Construction of Concrete Shell Roofs, became a worldwide reference from the US to Russia. He advised the UN on low-cost, high-performance housing for developing nations and won the Shanti Swarup Bhatnagar Prize — India’s highest science honour.
Yet ask anyone today who engineered the logic behind India’s great industrial domes, and they’ll draw a blank.
He fell into no man’s land: too mathematical for engineers, too practical for physicists. His work became the literal roof over millions of lives — in factories, hangars, and public halls — with no monument, no public recognition, and no name on the skyline he quietly shaped.
The most complex physics, applied to the most human problem: how to give people shelter.
Dr. Snehamoy Datta (1894–1955): The Ghost of the Atomic Rainbow
In the 1920s, the greatest physicists in London and Germany cited “Datta” as the gold standard in spectroscopy. Today, he doesn’t even have a Wikipedia page.
Born in Bengal in 1894, Datta travelled to London and became one of the first Indians to earn a DSc from London University. He worked under Alfred Fowler — the architect of modern astrophysics — and rapidly became a world authority on atomic light. His specialty was spectral regularities: the mathematical fingerprints in light that reveal what stars and atoms are made of. He mapped the spectra of Magnesium, Calcium, and Strontium with such precision that Sommerfeld himself used Datta’s data to refine the atomic model.
He was the experimentalist who handed the theorists the evidence they needed to understand the electron.
Then he came home. Not for fame — but to build. He became Principal of Rajshahi College and later Presidency College, choosing institution-building over a European career. In doing so, he traded his own legacy for the futures of the students he trained.
He died in 1955, just as India’s big-science era was beginning. His contemporaries got statues and stamps. He got silence — not because his work was lesser, but because he never stayed to claim his place in the story.
His family knew him as a stern, brilliant academic. They had no idea that a generation of the world’s finest physicists had built on his light.
G.N. Ramachandran (1922–2001): The Ghost Who Mapped the Human Body
In a modest Madras lab, with little equipment and no institutional fanfare, G.N. Ramachandran solved two problems that define modern medicine. The world was watching Watson and Crick. Nobody was watching Madras.
Born in Ernakulam in 1922, he was C.V. Raman’s most celebrated student — Raman reportedly called him the most brilliant he ever taught. He went to Cambridge, worked at the Cavendish Lab, and returned to India not to chase prestige, but to chase structure.
He solved collagen. Before 1954, nobody knew the shape of the most abundant protein in the human body — the one that holds our skin, bones, and teeth together. Working with almost no advanced equipment, Ramachandran discovered it was a triple helix. The finding was disputed, then validated, then quietly absorbed into textbooks without his name attached to the moment.
He created the Ramachandran Plot — a mathematical map defining which shapes a protein can physically adopt and which are geometrically forbidden. It remains the foundational tool of structural biology, used in every protein analysis run today.
He laid the mathematics for the CT scan. His Fourier-based methods for reconstructing 3D structures from 2D X-ray shadows became the computational backbone of modern medical imaging. Every CT scan is, in a precise sense, his physics.
Francis Crick cited his work. Linus Pauling acknowledged him. The Nobel committee never called.
He founded the Molecular Biophysics Unit at IISc and built the Madras school of crystallography from scratch. But India’s science establishment rewarded rockets and reactors. Quiet biology, done in the south, by a man who read the Upanishads between equations, didn’t fit the national narrative.
In his later years, severe psychiatric illness drove him into isolation. To his neighbors, he was a difficult, eccentric professor. They had no idea they were living next to one of the greatest scientists of the 20th century.
He died in 2001. His name is in every biochemistry textbook. His story is in none.
G.S. Ramaswamy
He didn’t build with more material — he built with better physics. While engineers piled on steel and concrete, he used the mathematics of curvature to create structures as thin as an eggshell and as strong as stone.
Trained at Caltech during its golden age, Ramaswamy saw buildings not as bricks and mortar, but as stress-strain fields. Obsessed with how nature bears load — how an eggshell resists crushing simply through shape — he pioneered the Funicular Shell: roofs designed along catenary curves, paper-thin yet structurally formidable, requiring a fraction of conventional material.
He founded the Structural Engineering Research Centre (SERC) and made India a global leader in shell structures decades before the West caught on. His book, Design & Construction of Concrete Shell Roofs, became a worldwide reference from the US to Russia. He advised the UN on low-cost, high-performance housing for developing nations and won the Shanti Swarup Bhatnagar Prize — India’s highest science honour.
Yet ask anyone today who engineered the logic behind India’s great industrial domes, and they’ll draw a blank.
He fell into no man’s land: too mathematical for engineers, too practical for physicists. His work became the literal roof over millions of lives — in factories, hangars, and public halls — with no monument, no public recognition, and no name on the skyline he quietly shaped.
The most complex physics, applied to the most human problem: how to give people shelter.
Sir Jagadish Chandra Bose (1858-1937)
He was a biologist, physicist, botanist, and belatedly recognised as the father of radio science. He was born in India during British rule, invented the wireless telegraphy and made a demonstration of the same in 1895. During the public show at Calcutta’s Town Hall, he managed to send electromagnetic waves over a distance of 75 feet. The waves passed right through a wall and managed to ring a bell wirelessly. The Governor of Bengal was also present during his presentation.
Sadly, this invention’s credit is often given to Marconi – an Italian scientist, who made a demonstration in 1897 but filed a patent in 1896. What Marconi did was that he made use of Bose’s Mercury Coherer to come up with a two-way radio that is capable of communicating wirelessly. The problem was that Bose didn’t file for a patent and Marconi took the opportunity to patent it and became celebrated for something that he never invented.
Sir J C Bose deserved two Nobel prizes (one for radio and another for proving the existence of life in plants) but ironically got none as he was from a colonised nation. An English man got the Nobel prize on Bose’s thesis. Another case of western plagiarism and taking credit.
Narinder Singh Kapany (1926–2020): The Man Who Bent Light
Narinder Singh Kapani (92 years) is acknowledged as the Father of ‘Fiberoptics’- a term he coined. His work in 1953 ushered in a new era of High-speed Internet, endoscopy, and spectroscopy. An unsung hero, he never patented it. He never won a Nobel.
It started with a classroom argument. His teacher said light only travels in straight lines. Kapany asked why it couldn’t be bent — and spent his life proving it could.
In 1953, working at Imperial College London, he successfully transmitted light through bent glass fibers. He coined the term “fiber optics,” wrote the first book on it, and became the field’s defining voice. Today, a single fiber the width of a human hair carries 32 terabytes of data per second. Every streaming service, video call, and undersea cable runs on his idea.
In 2009, the Nobel Prize in Physics went to Charles Kao — who built on Kapany’s foundational work. Kapany noted it simply: “The researcher who built on my work won the Nobel.”
He held over 100 patents, founded multiple companies, and gave generously to Sikh art, culture, and education. Fortune named him an “Unsung Hero of the 20th Century” in 1999. India awarded him the Padma Vibhushan — posthumously, in 2021. He had died the month before.
The internet paused briefly to mourn him — then went back to streaming, on the infrastructure he built.
Sambhunath De (1 Feb 1915 – 15 April 1985)
He was a medical scientist and researcher, who discovered the choleratoxin, the animal model of cholera. He successfully demonstrated the method of transmission of cholera pathogen Vibrio cholerae.
De did his medical degree from Calcutta & finished his PhD from London. In 1959 De was the first to demonstrate that cholera bacteria secrete enterotoxin. This discovery eventually promoted research to find a treatment aimed directly at neutralising the cholera enterotoxin. De’s paper “Enterotoxicity of bacteria-free culture-filtrate of Vibrio cholera,” while initially unrecognised, today is considered a milestone in the history of cholera research. He also did extensive research against E.Coli & published many papers which are considered as the benchmark by academia.
In the words of Nobel Laureate Joshua Lederberg, “De’s clinical observations led him to the bold thought that dehydration was a sufficient cause of pathology of cholera. The cholera toxin can kill ‘merely’ by stimulating the secretion of water into the bowel”. Thus, the oral rehydration therapy (ORT) for replenishing the massive fluid loss in cholera patients has saved innumerable lives should be considered as a direct outcome of De’s discovery of cholera toxin. His findings on exotoxins set the stage for the modern views of diseases caused by toxin producing bacteria, helped in the purification of cholera and heat-labile (LT) enterotoxins produced by V. cholerae and E. coli, respectively.
Nobel laureate Prof. Joshua Lederberg had nominated De for the Nobel Prize more than once. Said Lederberg, “Our appreciation of De must then extend beyond the humanitarian consequences of his discovery. He is also an examplar and inspiration for the boldness of challenge to the established wisdom, a style of thought that should be more aggressively taught by example as well as precept.” And yet De was never elected a fellow of any Indian academy and never received any major award.
As Professor Padmanabhan Balaram pointed out in an editorial in Current Science, “De died in 1985 unhonoured and unsung in India’s scientific circles. That De received no major award in India during his lifetime. Our Academies did not see it fit to elect him to their Fellowships must rank as one of the most glaring omissions of our time.
Read more: https://www.thebetterindia.com/198411/indian-nobel-prize-scientists-cholera-toxin-sambhu-nath-de/
Dr. Snehamoy Datta (1894–1955): The Ghost of the Atomic Rainbow
In the 1920s, the greatest physicists in London and Germany cited “Datta” as the gold standard in spectroscopy. Today, he doesn’t even have a Wikipedia page.
Born in Bengal in 1894, Datta travelled to London and became one of the first Indians to earn a DSc from London University. He worked under Alfred Fowler — the architect of modern astrophysics — and rapidly became a world authority on atomic light. His specialty was spectral regularities: the mathematical fingerprints in light that reveal what stars and atoms are made of. He mapped the spectra of Magnesium, Calcium, and Strontium with such precision that Sommerfeld himself used Datta’s data to refine the atomic model.
He was the experimentalist who handed the theorists the evidence they needed to understand the electron.
Then he came home. Not for fame — but to build. He became Principal of Rajshahi College and later Presidency College, choosing institution-building over a European career. In doing so, he traded his own legacy for the futures of the students he trained.
He died in 1955, just as India’s big-science era was beginning. His contemporaries got statues and stamps. He got silence — not because his work was lesser, but because he never stayed to claim his place in the story.
His family knew him as a stern, brilliant academic. They had no idea that a generation of the world’s finest physicists had built on his light.
Amal Kumar Raychaudhuri
Edwin Hubble showed that galaxies are moving away from each other, but he didn’t have the mathematical framework to trace everything back to a single origin—the Big Bang.
In 1953, a physicist in Kolkata, Amal Kumar Raychaudhuri, derived a single equation that changed everything. At the time, he was being pushed into routine lab work studying the properties of metals, while quietly working through the deepest questions of the universe on scrap paper. His work, now known as the Raychaudhuri Equation, showed that if gravity is always attractive, then matter in an expanding universe must have originated from a singularity.
Raychaudhuri taught at Presidency College, Kolkata, where he was celebrated as an inspiring educator despite modest recognition during his lifetime. He passed away on June 18, 2005, but his equation remains vital for studying black hole horizons and cosmic evolution.
To understand the impact of this:
Many believe Stephen Hawking proved the Big Bang. But in his doctoral work, he relied heavily on the Raychaudhuri Equation as a core mathematical tool. The famous singularity theorems developed by Roger Penrose and Hawking—work that led to Penrose receiving the Nobel Prize in Physics in 2020—are, in many ways, profound extensions of Raychaudhuri’s 1953 insight. For years, the equation was widely cited in the West without recognition of the man behind it. Many even assumed “Raychaudhuri” was just a technical term, unaware that he was a real scientist working quietly in India.
Dr. Yellapragada Subba Row (1895–1948)
Born in Bhimavaram, Andhra Pradesh, India. Known as the “Wizard of Wonder Drugs” for his extraordinary contributions. Scientific community feels he deserved atleast 3 Nobel Prizes for his Pioneering drug discoveries. Both at Harvard and Lederle Labs, New york he discovered the following :
- The Fiske-Subbarow Method – Working with Cyrus Fiske, he developed a colorimetric method for the estimation of phosphorus in body fluids. Published in 1925, this became one of the most cited papers in scientific history (over 20,000 citations).
- Discovery of ATP (Adenosine Triphosphate) – He was the first to isolate and identify ATP and phosphocreatine, describing their role as the primary “energy currency” of the cell. This discovery is a cornerstone of every biology textbook today, explaining how muscles contract and how cells store energy.
- Synthesis of Folic Acid (Vitamin B9) – Driven by the tragic loss of his brothers to tropical sprue (a nutritional deficiency disease), he successfully synthesized folic acid in 1945. This was crucial for treating macrocytic anemia and is now a global standard for preventing birth defects during pregnancy.
- Methotrexate – The world’s first effective chemotherapy drug. Developed alongwith with Dr. Sidney Farber, it revolutionized the treatment of childhood leukemia and is still used for various cancers and rheumatoid arthritis.
- Aureomycin – The first tetracycline (broad-spectrum) antibiotic. It was effective against a much wider range of bacteria than penicillin, including those causing typhus and the plague.
- Diethylcarbamazine (Hetrazan) – A breakthrough treatment for Filariasis (elephantiasis), a disease that afflicted millions in Asia and Africa.
- Vitamin B12 – His lab was instrumental in isolating and concentrating liver extracts to treat Pernicious Anemia, leading to the identification of B12.
Global Health Impact: His medicines continue to save lives worldwide.
Sandith Thandasherry 
