In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

A genetic test that can predict whether a person is likely to live long enough to see their 100th birthday has been developed by scientists. 
  
 Researchers at Boston University claim the test can identify those who can look forward to an exceptionally long life with 77% accuracy. 
  
 They designed the test after a major study into the genetic makeup of centenarians highlighted a host of DNA variants that boost a person's chances of reaching a ripe old age. 
  
 Many of the genetic markers the scientists found stave off common, and often lethal, age-related diseases, such as heart disease, dementia and high blood pressure. 
  
 The US researchers investigated the genetic secrets of a longer life after studies showed that living beyond 100 often runs in families. 
  
 "These families might share healthy lifestyles, but it also suggests there is a strong genetic background to exceptional longevity," said Professor Paola Sebastiani, a biostatistician at Boston University school for public health. 
  
 Lifespan is governed by a complex interplay of genes, lifestyle and environment, with factors like smoking, diet, exercise and pollution all having a role, but many scientists believe that living beyond the mid-90s is largely down to having good genes. 
  
 Sebastiani and colleagues scanned the genomes of 1,055 centenarians and compared them with scans from 1,267 normal, healthy people. They found 150 DNA variants that were more common in the old-aged group and seemed to make their bodies healthier and more resilient. 
  
 The centenarians could be divided into 19 groups based on their genetic makeup. One of these groups was particularly resistant to age-related diseases and contained nearly half of all the centenarians that lived to 110 years or more. 
  
 "There are particular combinations of these genetic variants that allow people to live not only a longer life, but also a healthier life. In centenarians, disability and disease tend to be delayed until the very end of their lives," Sebastiani said. 
  
 The study, published in the US journal Science, will help researchers unravel why and how the body ages and potentially lead to drugs that can slow down the ageing process. 
  
 "If we can pinpoint genetic variants that delay the onset of diseases, it could have very important medical implications for the population in general," said Sebastiani. 
  
 One intriguing finding in the study was that gene variants that raise a person's risk of disease may matter less than genes that protect against disease. The scientists found that centenarians had roughly the same number of high-risk genes as the rest of the population, but had more protective genes to cancel them out. The finding is important, because commercial genetic tests look only for genes that raise a person's disease risk, rather than reduce it. 
  
 The study looked only at Caucasians, but Sebastiani said scientists should now look for DNA markers of longevity in other populations, such as Africans and Asians. 
  
 Jeffrey Barrett, an expert on disease genetics at the Wellcome Trust's Sanger Institute near Cambridge, said the test might turn out to be less accurate when it is independently verified. 
  
 "Some of the genetic variants in this study are claimed to have much, much stronger effects on longevity than we've seen in similar studies of diabetes, heart disease, and cancer. For instance, the strongest single effect makes someone 10 times more likely than average to be extremely long-lived, compared to other complex diseases where typical variants only make someone, say, one and a half times as likely to be diabetic," he said. 
  
 "Subtle biases in their work could contribute to these surprisingly large effects, which would make the test seem more accurate than it really is. Evaluation of the test by an independent laboratory will be the ultimate test of its accuracy," he added. ||||| By Carolyn Y. Johnson 
  
 Globe Staff 
  
  
  
 LEOMINSTER -- Five months shy of his 100th birthday, Louis Charpentier still rises every day at 9 a.m. to spend hours in his basement shop, carving delicate wooden figurines. Years after most people's bodies and minds have failed, Charpentier climbs stairs with ease and recalls everything from the latest episode of "Dr. Phil" to the first train he ever saw, carrying soldiers who fought in World War I. 
  
 For years, scientists have been fascinated by people like Charpentier, who have not only a rich trove of experience, but are also biological outliers that scientists are studying to begin to unlock the secrets of longevity. 
  
 Now, using cutting-edge genomics techniques on a group of 1,055 people born near the turn of the last century, a team of scientists from Boston University has identified a genetic signature of longevity. In work published online today by the journal Science, researchers reported that 150 spots in the genome are associated with extremely long life, and can be used to predict with 77 percent accuracy whether someone is likely to live to be exceptionally old. 
  
 "Exceptional longevity is not this vacuous entity that no one can figure out. I think we’ve made quite some inroads here in terms of demonstrating a pretty important genetic component to this wonderful trait," said Dr. Thomas Perls, the senior author of the paper and the director of the New England Centenarian Study at Boston Medical Center. 
  
 The goal is to use the data to investigate what genes play a role in longevity, and to understand how it is that centenarians live so long and stay free of disease or disability. Researchers hope that lessons learned from extremely long-lived people could point to new ways to help everyone else age healthier. Perls was quick to add that the present study examines the genetic basis of healthy aging, and that it would be premature for people to buy a genetic test to predict their longevity. 
  
 Companies that offer genetic tests directly to consumers already tell people if they carry genetic variations that hold risk for diseases or traits ranging from Parkinson's disease to lactose intolerance have already drawn criticism from some scientists and doctors, and the US Food and Drug Administration recently wrote letters to several companies that already offer such tests, requiring them to seek regulatory approval. 
  
 "You could conceivably produce a chip that would help predict people’s genetic predisposition to exceptional longevity. But I and all the authors of the paper want to instill a great deal of caution," Perls said. "I start worrying a bit bout what insurance companies and others might do with that information -- I, for one, think it’s not ready from a social point of view." 
  
 In order to uncover genetic markers associated with extremely long life, researchers used statistical tools to analyze genetic samples from 801 people, aged 95 to 119. Led by Paola Sebastiani of the Boston University School of Public Health, the team looked at 300,000 spots in the genome of the centenarians and compared them with others to find variations that were associated with longevity. 
  
 They found 150 areas in the genome that were associated with longevity, and then tested their tool on a separate group of 254 centenarians and 341 people who were born later. They found that they could predict with 77 percent accuracy whether or not the people were exceptionally long-lived. 
  
 Researchers not involved in the research said the new work provides an interesting glimpse of exceptional longevity, but no fast and easy fountain of youth. 
  
 "I would say you could either see this as the glass being half-empty or half-full," said Leonard Guarente, a biology professor at MIT who does aging research. The half-full scenario is there are now many new genetic spots to investigate that have something to do with exceptional longevity, he said. "The glass half-empty would say the analysis of these people is already bewilderingly complex and we're never going to make any headway with this approach." 
  
 The results will also have to be replicated in other groups of people to see if they hold up. The ideal analysis would have looked for genetic differences between people who lived to be 100, compared with people born at the same time and died younger, but those people have long since died. 
  
 Dr. David Altshuler, a core member of the Broad Institute, a Cambridge genetics research center, said in an e-mail that the results were somewhat surprising, because when researchers have looked for the genetic underpinnings of common diseases, they do not usually find such a strong signal. 
  
 "I would have guessed that longevity would be even more complex," Altshuler wrote. 
  
 It's clear that lifestyle and environment play a large part in a person's longevity. In studies of twins, researchers have found that 20 to 30 percent of a person's longevity is influenced by genes. But when it comes to extremely long life, genetics seems to play a critical role. 
  
 The spry, neatly-dressed Charpentier doesn't know how to explain his longevity. His parents lived to be 72 and 85, and he lives healthily. He doesn't drink, he watches what he eats, and he quit smoking cigars 40 years ago. He wasn't involved in the genetic study published yesterday, but -- about to join the rare ranks of the one in 6,000 people who live to 100 -- is one of the subjects being studied by scientists. 
  
 Things aren't perfect -- he's a little less steady on his feet than he used to be, and can't lift weights like he did when he was young. But he still works in his shop, lives on his own, and remembers in detail the thoughts and experiences he had as a little boy. 
  
 "I feel I'm almost the same as when I was younger," Charpentier said. "If it keeps on like I am now, I don't mind if I live to be 110." 
  
 E-mail Carolyn Y. Johnson. 
  
  |||||
Researchers say they've found 150 genetic markers that can predict with 77% accuracy whether someone is likely to live a century or so. The scientists at Boston University made the discovery in a detailed study of the genomes of more than a 1,000 centenarians, reports the Guardian. Just don't expect a test to be showing up at CVS anytime soon. "You could conceivably produce a chip that would help predict people’s genetic predisposition to exceptional longevity," the lead researcher tells the Boston Globe. "But I and all the authors of the paper want to instill a great deal of caution. I start worrying a bit bout what insurance companies and others might do with that information. I, for one, think it’s not ready from a social point of view."