I've always known the blessing of nasal breathing but this article really carries it to another level due to all the references provided. There is one thing Allison that you could've also mentioned: nasal breathing has also been the key factor in yogic exercises and spiritual awakening techniques for over 2,000 years. Buddha's main method of meditation was breathing through the nose and following it. One important book I can recommend on the importance of nasal breathing to self-realization is "Breath by Breath" by Larry Rosenberg. I commend you for addressing this important topic. Well done.