Why do some people stay mentally sharp even when their brains show clear signs of Alzheimer’s disease? Scientists have found an important clue hidden in a rare group of resilient brains

• A person suffering from Alzheimer's (Image- Canva)Old age is a dreadful stage, with tiredness, pain and diseases always around the corner.
• One such uninvited guest is Alzheimer's disease.
• But there's something interesting that scientists have noticed in people with Alzheimer's.