Continuous reading and learning may be the best way to prevent Alzheimer's disease.

Nun Mary remained mentally clear and sharp until her death at age 101.
After her death, researchers dissected her brain and found it was already filled with severe Alzheimer's pathology.
Researchers believe that her long-term engagement in reading, writing, teaching, and learning activities built richer and more complex neural networks in her brain.
When some neurons are damaged by Alzheimer's, the brain can still complete tasks through other circuits.