For most people, success means squeezing as much as possible into 80‑odd years: a big job with a flashy title and matching salary, a swanky apartment in the city or McMansion in the suburbs, bucket‑list trips squeezed into limited vacation days, kids if they want them—and maybe an early retirement if everything goes to plan.

For Silicon Valley millionaire Bryan Johnson, that feels too small.

The entrepreneur who famously spends millions each year trying to slow his own aging now has a new target in his sights: he wants to make humans immortal by 2039.

“The search for the fountain of youth is the oldest story ever told,” Johnson wrote on X and Facebook. “For the first time in the history of life on earth, in just the past 24 months, the window has opened for a conscious being to realistically strive for this goal. It is an absolutely insane moment.”

The 48-year-old said that the 14-year goal is based on “new, promising therapies that can turn back the clock decades,” while adding that thanks to AI, it’s actually a very “reasonable target.”