As we age, our brain’s grey matter—the stuff we rely on for seeing, hearing, processing emotion, exerting self-control, learning information, and much more—shrinks and degrades. Well, not for everybody. Scientists have recently discovered a rare group of people above the age of 80 that have a bigger brain size that helps to protect against the effects of aging. These people are known as super-agers, and they are able to retain the same cognitive abilities as most people in their 50s. Being a super-ager is rare, but there are ways you can keep your mind sharp even if you aren’t one.