Welcome to a new series of e-books that my colleague and I will be making available on a regular basis. These books will be created using Apple i-books, so they can only be viewed and downloaded on an IPad. The advantage of this format is that the books are much more interactive -- with a video introduction, audio explanations, and active web links to articles and topics of interest. They are intended to be shorter essays that can be read within an hour.

Our first book -- A Measured Breath of Life -- is devoted to the most misunderstood topic in the field of aging today: the question as to whether or not there is a biologically based limit to the duration of our lives. Our answer may surprise you!