Sri Sri Ravi Shankar, Spiritual Leader

Sri Sri Ravi Shankar is one of India's best-known spiritual leaders, a man famous for his breathing exercises.

He has been called the world's most globalised guru - drawing vast audiences wherever he travels - to hear his message and learn his breathing techniques.

He talks to Owen Bennett Jones about his childhood, his interest in science, his spiritual roots and, of course, the meaning of life.