Why stop at 100?

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By Gabriella Boston

Old is definitely the new young. A report on increased life expectancy published in the peer-reviewed British medical journal the Lancet earlier this month predicts that more than half of all babies born today will reach their 100th birthdays.

For the layman, this prediction may conjure a brave new world of hitherto unimaginable human longevity. For those more at home modeling the world of the future, though, it's actually seen as a rather modest expectation.

"We have seen a linear increase in life expectancy for more than 150 years. And there's no sign we're close to a looming age ceiling," says Dr. Kaare Christensen, the director of the Danish Aging Research Center and lead author of the report, on the phone from Odense, Denmark.

Dr. Terry Grossman and Ray Kurzweil, authors of "Transcend: Nine Steps to Living Well Forever," go much further. "The estimate of 100 is absurd," Mr. Kurzweil says, explaining that it is based on the present state of medical knowledge, which is bound to advance "exponentially" in the century ahead.

Mr. Kurzweil and others are working on medical technology that aims to change health outcomes on a cellular level. "Health and medicine is now an information technology," Mr. Kurzweil, an inventor and futurist, says. "And information that fits in my cell phone today will fit in a blood cell in few years."

In other words, the goal is no longer to treat diabetes, for example, with insulin, but to block the expression of diabetes by manipulating the body on a molecular and genetic level.

This, in turn, might just mean that you can "have your cake and eat it, too." Obesity -- no matter how much you eat -- will not exist because we have reprogrammed our genes not to express it.

"There will be a quantum leap in evolution, and the world as we know it won't be here in 40 years," declares Dr. Grossman.

He predicts that by 2050, the only deaths we'll see are accidental.

Wow. That's a lot to take in.