InfoAging (an excellent general resource for information on aging and aging research, by the way) is reporting on progress in fighting Alzheimer's. The immense amount of research funding is starting to pay off: scientists have prevented memory and learning loss in the mouse version of the disease. In addition, other interesting results on the possible root causes of Alzheimer's are noted at the site. It's worth remembering that Alzheimer's symptoms were once considered a part of aging; not a disease and not curable. That should make you pause for thought whenever you hear people claiming that all the currently unspecified degenerative effects of aging are not worth research time and money.