Why do we age? What are the mechanisms that regulate aging on a cellular level? Is it possible to extend youthfulness through genetic manipulation? These are some of the tantalizing questions that will be the subject of a new signature course at the MDI Biological Laboratory , in Bar Harbor, Maine, that will address two of the most fundamental issues related to aging: can we strengthen our cellular systems to make them more resistant to aging, and can we identify ways to regenerate tissues that have already been damaged? The course, entitled ” Comparative and Experimental Approaches to Aging Biology Research ,” will bring together an international group of 20 early career scientists with more than 20 leading experts in the field of aging.