In AD 1196, Al-Aziz Uthman, Saladin's son and the Sultan of Egypt, attempted to demolish the pyramids, starting with that of Menkaure. Workmen recruited to demolish the pyramid stayed at their job for eight months, but found it almost as expensive to destroy as to build.
Alzheimer's disease (AD) is a neurodegenerative disease that usually starts slowly and progressively worsens. It is the cause of 60–70% of cases of dementia .   The most common early symptom is difficulty in remembering recent events .