The Nun Study

How one scientist and 678 sisters are helping unlock the secrets of ALZHEIMER'S

It's the day after Easter, and the first crocus shoots have ventured tentatively above the ground at the convent on Good Counsel Hill. This is Minnesota, however; the temperature is 23[degrees]F and the wind chill makes it feel far colder. Yet even though she's wearing only a skirt and sweater, Sister Ada, 91, wants to go outside. She wants to feed the pigs.

But the pigs she and the other nuns once cared for have been gone for 30 years. Sister Ada simply can't keep that straight. In recent years, her brain, like a time machine gone awry, has been wrenching...

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