I had a great discussion with Dr. Gary Small on keeping our brains younger. He challenged me to build a Sudoku puzzle, which I did. Learn how to make your brain younger in two weeks. Get the Sudoku puzzle at http://older.fitness/sudoku Link: DrGarySmall.com Gary Small: Dr. Gary Small, (Los Angeles, CA) is a professor of psychiatry and director of the UCLA Longevity Center* at the Semel Institute for Neuroscience & Human Behavior. His research, supported by the NIH, has made headlines in the Wall Street Journal and the New York Times. Scientific American magazine named him one of the world’s leading innovators in science and technology. Dr. Small lectures internationally and frequently appears on the Today show, Good Morning America, PBS, and CNN. He has written six books, including the New York Times best seller, The Memory Bible.