Niamh Lyons January 11, 2015 Meditation Harvard unveils MRI study proving meditation rebuilds the brains gray matter. Niamh Lyons January 11, 2015 Meditation http://www.feelguide.com/2014/11/19/harvard-unveils-mri-study-proving-meditation-literally-rebuilds-the-brains-gray-matter-in-8-weeks/