Eva Bober’s team at the Max Planck Institute for Heart and Lung Research in Bad Nauheim, Germany, reported that sirtuins stabilize human rDNA.23 Then, in 2018, Katrin Chua at Stanford University found that, by stabilizing human rDNA, sirtuins prevent cellular senescence—essentially the same antiaging function as we had found for sirtuins in yeast twenty years earlier.24 That was an astonishing revelation: over a billion years of separation between yeast and us, and, in essence, the circuit hadn’t changed.
