The term "longevity" has been on everyone's lips for a few years now. Millionaires in the tech industry and Silicon Valley CEOs in particular have focused not only on healthy living, but also on living as long as possible. Sometimes they invest a lot of money in this effort. Such is the case with Tech CEO Bryan Johnson (45), for example, he has a goal of returning to a second youth by regressing to a biological age of 18. 

Read more »