ljw1004 writes "Alzheimer's researchers are divided on whether the disease is caused by 'beta amyloid' (a peptide found in Alzheimer brains) or by 'tau protein' (normally used for cellular scaffolding, but can aggregate out of control and destroy neurons). Today in Chicago a new drug has been announced that stops tau aggregation and appears to have halted Alzheimer's-related decline in 300 clinical trial patients. The drug is known as 'rember.' Do you have friends or family who appear to be on the road to dementia? Here is an online questionnaire, part of one used in the clinical trial to diagnose dementia. (Disclosure: I made the online questionnaire, and my father is one of the scientists behind the drug.)"