“The mice,” Bonkowski said. “They won’t stop running.” The mice he was talking about were 20 months old. That’s roughly the equivalent of a 65-year-old human. We had been feeding them a molecule intended to boost the levels of NAD, which we believed would increase the activity of sirtuins. If the mice were developing a running addiction, that would be a very good sign. “But how can that be a problem?” I said. “That’s great news!” “Well,” he said, “it would be if not for the fact that they’ve broken our treadmill.”
They ran over the exceeded limit 3km
