It is with great sadness I learnt about the passing away of Krishnan. My association with him goes back over 40 years.He was one of the most passionate persons I knew re: doing science. He had a child like innocence and enthusiasm over his whole career to his approach to work to life and everything. It was a privilege to be his friend. I have not seen many people like him.I will miss him. At this time our hearts goes out to Chandra and his family. Chandra was a pillar of strength for Krishnan. She was a great support . I pray to God that He gives her strength to see her through the crisis.