For most of her life, Joan Martinuzzi was made to feel that her energy and intensity were flaws to be corrected rather than gifts to be cultivated. At 71, the Brisbane retiree chose to stop apologizing for who she is — and in doing so, she may have stumbled upon one of the most powerful forms of medicine available to an aging mind. Science is now catching up to what she has lived: that genuine social connection, joyful movement, and purposeful engagement may prevent nearly half of all dementia cases, suggesting that the quality of how we inhabit our lives shapes the very architecture of our mi