All things must die, according to the poet Alfred Lord Tennyson, but that could be about to change.

A growing number of tech billionaires have decided they want to use their enormous wealth to try to help humans “cheat death.”

Amazon’s Jeff Bezos, Alphabet’s Larry Page, Oracle’s Larry Ellison and Palantir’s Peter Thiel are just a few of the super-rich who have taken a keen interest in the fast-emerging field of longevity, according to interviews, books and media reports.