See:
http://www.smart-publications.com/interviews/mavericks-of-medicine/john-guerin/
When we think of things that live longer than people, it isn't all tortoises and trees. Whales can greatly outlive people and are mammals. A hundred year old one got killed by whalers while having sex, so it suggests they are old but quite vital.
This aspect of the fight against aging is often neglected or forgotten. To me, it inspires hope.
metatron