Two new animal studies suggest that coffee may help reverse and even prevent Alzheimer's disease. In one study, researchers gave mice an equivalent of about three to five cups of strong coffee per day and found that after two months, the subjects had greatly improved memory when compared to mice who received just water. The mice also had 50 percent less amyloid beta protein in their brains. Experts say it's not completely clear if these results will be the same for humans, but it may be that...