Billionaires like to shape how people live, from the cars they drive to the phones they use. Many billionaires are also turning their attention to how long people live, by investing in a number of biotech startup companies and research groups. Amazon.com Inc. Founder Jeff Bezos holds investments in Altos Labs, an anti-aging science startup. Altos Labs is developing drugs that can reverse or slow the aging process and counts Oracle Corp. Co-Founder Larry Ellison and science and technology entrepr