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- Telomeres are now known to be the clock of cell aging,
- Guarente and his colleagues hypothesized several years ago to explain why cells age.
- It also marks a watershed advance in the long intractable subject of why human cells age.
- The study of why cells age has been something of a research backwater for many years.
- The key issue tackled by the ACT research has to do with the way living cells age.