You may now be asking yourself why scientists are running around suggesting we drink the blood of our young. Well, rest assured: they are not doing that. In a review letter in the journal Nature titled "Facing up to the global challenges of aging," researchers focused on a very real and pressing topic: the fact that people are generally living longer, but aren't necessarily having a great time of it. As the big ol' baby boom generation approaches old age, we must increasingly find ways to keep our elderly healthy instead of just keeping them around. Led by Linda Partridge of University College London, the team spitballs on various problems faced by our aging planet and how we might best confront them.