We used to work together <a href=" http://www.laughmom.com/dialogue-essay-about-friendship/#crumb ">science and ethics essay</a> Experts have suspected a decline in dementia rates for some time, though it has been difficult to prove.  Now, scientists have statistical evidence to back these hypotheses, which they believe can be attributed to a generally healthier and better educated population.  Across the board, there is a lower incidence of dementia among better educated people, as well as among those who control their blood pressure and cholesterol levels.