India, Feb. 26 -- It's Maha Shivratri today! Om, which is often chanted to connect with the divine energy of Lord Shiva, is said to be the primordial sound energy, reverberating throughout the universe. Did you know that besides being part of sadhana (prayer), it also has several physical and mental health benefits? Experts say that the Om sound purifies the subtle energy known as prana, as it helps in energising the chakras and calms down the mind. While it may sound like an easy chant, one needs practise to get it correct and to generate the vibrations....