Dementia is a brain disorder that seriously affects a person's ability to carry out daily activities. The most common form of dementia among older people is Alzheimer's disease (AD), which initially involves the parts of the brain that control thought, memory, and language. Although scientists are learning more every day, right now they still do not know what causes AD, and there is no cure.

In this Time/CNN article, Walter Kukull, director of the U.S. National Alzheimer's Coordinating Center explains how researchers could reduce people's risk of Alzheimer's Disease. In this brief yet informative interview, he talks about genetics, drug discovery, and mitigating diseases.