"Newberg's scans have also shown the ways in which religious practices, like meditation, can help shape a brain. Newberg describes one study in which he worked with older individuals who were experiencing memory problems. Newberg took scans of their brains, then taught them a mantra-based type of meditation and asked them to practice that meditation 12 minutes a day for eight weeks. At the end of the eight weeks, they came back for another scan, and Newberg found some dramatic differences."

Meditation for geezers