http://www.fightaging.org/archives/2002/12/death-is-an-outra...
You'll see a number of mainstream foundations in the Methuselah Foundation lists, and those also support the SENS Research Foundation, working on the basis for ways to reverse the cellular and molecular damage that causes aging. The Gates foundation isn't there:
http://mfoundation.org/?pn=donors
But that's not entirely surprising: from the beginning, the Gates Foundation has been a very traditional Big Philanthropy operation. Wealth does not grant vision. Where there is innovation or stepping away from the norms it is of the incremental type, with none of what Peter Thiel calls "radical philanthropy". Is this is a criticism of Gates? Sure. But it's equally a criticism of everyone else. The Gates Foundation is doing what most people think Big Philanthropy should do. The blind spot for aging is near universal.