Silicon Valley billionaires are obsessed with 'reprogramming' their bodies for longevity. The first human trial suggests they may be onto something.

Silicon Valley billionaires including Bezos, Thiel, Milner, and Altman are investing in cellular reprogramming technology to reverse aging. Life Biosciences has begun the first human trial, treating glaucoma patients with an experimental therapy that showed early promise with two of three patients experiencing vision improvements and no major side effects reported.