hello,
why do your think richest people isn't interesting about lifespan at all?. Is a stupid question but, i don't know...i think in people like Warren Buffett, Bill Gates, Google´s founders, Walton, etc, etc.
This rich people don´t want live more longer?, Warren Buffett (76 years old) have 50 billons dollars!!!!...in other hand, http://www.mprize.org have 4 millons, with hundred people donated.
Warren Buffett+Bill Gates 100+ billon dollars...are aging and dying with no problems about that nevertheless we (common people in general) want (or dreams) to fight aging...
(sorry for my english, i´m english student for two months ago)