Studies of a group of elderly nuns, some over the age of 100, showed excellent mental agility and sharpness.
The nuns were from the convent of the School Sisters of Notre Dame of Good Counsel Hill of Mankato, Minnesota.
How did they do it?
They kept themselves mentally challenged and active with crosswords, puzzles, reading, singing, hobbies, journaling, gardening, skipping, and learning new languages.
What a contrast to mindlessly watching TV.