Professor Claudia Kawas has been working on a groundbreaking longitudinal study involving people over the age of 90 since 2003. The study, known as the 90-plus study, follows over 1,600 people older than 90 living in Leisure World in Laguna Woods California. Recent work from the study was featured on 60 minutes Australia. In the feature, Professor Kawas presented some interesting facts, including how moderate alcohol consumption was associated with living longer, and that being underweight does not help you live longer. To watch the entire 60-minute segments.