Drop in demen­tia rates sug­gests dis­ease can be pre­vent­ed, researchers say (The Guardian): “In the UK, demen­tia has fall­en by a fifth over the past 20 years, pos­si­bly down to lifestyle and edu­ca­tion changes, high­light­ing ben­e­fits of pre­ven­ta­tive action… A team from three British uni­ver­si­ties con­clud­ed that as a result the num­ber of new cas­es…