If warding off Alzheimer's was as easy as taking a pill – wouldn't we all grab a glass of water and get medicated? The pills are called statins, but not everyone is on board with the idea of prescribing them to people as prevention.

A Dutch woman who reached 115 years of age and remained mentally sharp throughout life had a healthy brain when she died. The new study suggests Alzheimer's disease and other forms of dementia are not inevitable, as had been suspected.