Professor S Ranganathan is an Emeritus Professor and an Honorary and INAE Distinguished Professor at the Indian Institute of Science and Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru. As a specialist in Physical Metallurgy and Materials Engineering, Prof. Ranganathan has made outstanding contributions in field ion and electron microscopy, structure of interfaces and quasicrystals. He is a recipient of the Platinum Medal from the Indian Institute of Metals, the MRSI Medal and the Materials Science Prize from the Indian National Science Academy. His contributions have been recognised by fellowships to five academies and numerous awards. At NIAS, his work include materials heritage, an atlas of India in Science and Societal Impact of Nanotechnology.