While most Indians know about Visvesvaraya's immense contributions as the Diwan of Mysore, few are aware that the legendary engineer also played a key role in making Hyderabad flood-free way back in the 1900s.
Scholar, teacher, philosopher and statesman, Sarvepalli Radhakrishanan was one of 20th century's greatest thinkers. On Teacher's Day, here are some little-known facts from his inspiring life.