Obtaining 501(c)(3) tax exempt status in the US is an ordeal, and one that the SENS Foundation has now completed: "SENS Foundation is pleased to announce that it has been granted tax-exempt status as a 501(c)(3) public charity, with an effective date of March 9, 2009. Donations to the Foundation are fully deductible as a charitable contribution." If you've been putting off donating to support the SENS Foundation's work on the development of rejuvenation biotechnology, now is an excellent time to jump on in. Research costs money, but in the grand scheme of things the cost of building the first generation of technologies that will enable us to live for decades longer - and thus gain the time to wait for the second generation that will be even more impressive - is small. It will take only a few tens of millions of dollars a year for each of the strands of the Strategies for Engineered Negligible Senescence. That is a rounding error when compared against either the total medical funding in the US, or total charitable donations in the US. So make a donation, and persuade a few other people to look into the work of the SENS Foundation.