In Focus:

How long could we live?

How long do you want to live - to 85, 90, 100 or beyond? More important than how long we live is the state of our health in old age.

The oldest verified person to date was Jeanne Calment of France, who died in 1997 aged 122.

Now scientists in the United States believe drugs could be on the horizon that delay the diseases of old age and increase the healthy years of life.

But could such treatments also mean we live longer?

Undoubtedly, according to Aubrey de Grey, a biomedical geronto

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