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A number of companies and research groups are performing drug discovery by using effects on frailty in mice as a readout. To what degree is frailty an adequate measure of the harms done by aging? One way to answer that question is to assess mortality in a human study population […]

It is very hard to coax a damaged machine into continued operation without repairing the damage. It is expensive and time-consuming, the machine works poorly, and fails catastrophically only a little later than it would have done without all of that effort. Keeping damaged machines running is exactly the goal […]