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The lifespan secret: why giraffes live longer than ferrets

It is well known that somatic mutations — mutations in our body’s genetic code that accumulate over time — can cause cancer, but their broader role in ageing is less clear.

Now a team of researchers have measured the somatic mutation rates of a range of mammals and discovered a striking correlation between mutation rate and lifespan. Lending evidence to the theory that somatic mutations are a cause of ageing rather than a result of it.

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