This audio file is for the E for T Initiative designed by Dr.M.Semmal for Scientific Tamil Development. The students and Tamil scholars interested in making virtual presentations and videos based on the topic can listen to the audio file and express their willingness. Dr.M.Semmal Founder of Philocine - The Philosophical Aspect of Medicine Managing Director, Manavai Mustafa Scientific Tamil Foundation [M M S T F ] Trust Administrator - Ariviyal Tamil Mandram You Tube Channel Scientific Tamil Virtual Library - Audio Channel