Those who saw’A Beautiful Mind’, would remember that John Nash’s doctoral thesis had just 26 pages and 2 references, yet it was instrumental in advancing “Game theory”. What if I told you there is a scientist whose achievement is so astounding that he is perhaps the only Indian to “create” an intersectional branch of science? What if I told you that every year, his name echoes across the hallowed halls of science in foreign lands, but most of our students haven't even heard of him? Aneesur Rahman was born in Hyderabad in British India in 1927. His father was a professor and a philanthropist. His family generously donated their property for the creation of Urdu Hall in Hyderabad. His maternal uncle was a professor too. Rahman had a natural flair for subjects that would terrify ‘normal’ students — maths and physics. After getting BSc in Mathematics, he went on to get Tripos in Mathematics and Physics at the prestigious Cambridge University in the UK. From there, he went to Louvaine University in Belgium and got DSc in Physics under Professor Mannenbeck. It’s here that Rahman met a Chinese student Yueh-Erh Li who was doing MD( called Dr Jady by friends). They fell in love and got married. He came back to teach in Osmania university along with his wife. Soon after, he developed interest in the structure of water molecule - especially the polarisation of the hydrogen atom. Unfortunately research in India was at infancy in those days and Dr Rahman realized he was a whale in a tiny pond. He had to move to the ocean. He joined the Argonne National Laboratory in Illinois. His foundational paper in 1964 birthed “molecular dynamics” , one of the two pillars on which a vast body of computational physics rests.(the other is Monte Carlo method). His equation made it possible to calculate the trajectory of large number of interacting atoms with ease. His work, like Ramanujan’s , was so ahead of his time - that even today, potential applications are being discovered. The Nobel prize in physics for 2013 went to Karplus, Levitt and Warshel whose work depended heavily on Dr Aneesur Rahman’s. Some say there is an inverse association between genius and compassion -Dr Rahman was a prominent exception. He was known not just for his intellect, but also kind nature and mentored many students all over the world. His quiet, unassuming nature made him a much loved professor — and he remained so, until he got Non Hodgkin’s lymphoma — a cancer that took him away from us prematurely, at the age of 59. Perhaps he might have got a Nobel, if only he had lived longer. American Physical Society honors him as the father of computational physics and has instituted an annual award in his name. As a doctor with little idea of theoretical physics, writing Dr Aneesur Rahman’s portrait has been difficult , because of the complex nature of his work that straddles so many areas of science : mathematics, physics, computer science and chemistry. His equations are mind boggling, even intimidating, but what I do understand is this : Dr Rahman didn't just have a beautiful mind, but also a beautiful heart.