When it comes to aging, we tend to assume that cognition gets worse as we get older. Our thoughts may slow down or become confused, or we may start to forget things, like the name of our high school English teacher or what we meant to buy at the grocery store.

But that’s not the case for everyone.

For a little more than a decade, scientists have been studying a subset of people they call "super-agers.” These individuals are age 80 and older, but they have the memory ability of a person 20 to 30 years younger.