Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.The goal is to fix all broken links on the web . Crawls of supported "No More 404" sites. ||||| For the first time scientists have been able to put a figure on how many faces people actually know -- a staggering 5,000 on average 
  
 For the first time scientists have been able to put a figure on how many faces people actually know- a staggering 5,000 on average. 
  
 The research team, from the University of York, tested study participants on how many faces they could recall from their personal lives and the media, as well as the number of famous faces they recognised. 
  
 Humans have typically lived in small groups of around one hundred individuals, but the study suggests our facial recognition abilities equip us to deal with the thousands of faces we encounter in the modern world - on our screens as well as in social interactions. 
  
 The results provide a baseline with which to compare the "facial vocabulary" size of humans with facial recognition software that is increasingly used to identify people at airports and in police investigations. 
  
 Dr Rob Jenkins, from the Department of Psychology at the University of York, said: "Our study focused on the number of faces people actually know- we haven't yet found a limit on how many faces the brain can handle. 
  
 "The ability to distinguish different individuals is clearly important--it allows you to keep track of people's behaviour over time, and to modify your own behaviour accordingly." 
  
 For the study, participants spent an hour writing down as many faces from their personal lives as possible - including people they went to school with, colleagues and family. They then did the same for famous faces, such as actors, politicians, and other public figures. 
  
 The participants found it easy to come up with lots of faces at first, but harder to think of new ones by the end of the hour. That change of pace allowed the researchers to estimate when they would run out of faces completely. 
  
 The participants were also shown thousands of photographs of famous people and asked which ones they recognised. The researchers required participants to recognise two different photos of each person to ensure consistency. 
  
 The results showed that the participants knew between 1,000 and 10,000 faces. 
  
 Dr Jenkins added: "The range could be explained by some people having a natural aptitude for remembering faces. There are differences in how much attention people pay to faces, and how efficiently they process the information. 
  
 "Alternatively, it could reflect different social environments-some participants may have grown up in more densely populated places with more social input." 
  
 The mean age of the studies participants was 24 and, according to the researchers, age provides an intriguing avenue for further research. 
  
 "It would be interesting to see whether there is a peak age for the number of faces we know", said Dr Jenkins. "Perhaps we accumulate faces throughout our lifetimes, or perhaps we start to forget some after we reach a certain age." 
  
 ### ||||| People can remember up to 10,000 faces, with the average person able to recall around 5,000, a new study has found. 
  
 For the first time, psychologists have devised a method for estimating how many faces a person can remember. 
  
 The “facial vocabulary” comprises both people known personally to an individual and famous faces such as those of celebrities and politicians. 
  
 A team at York University developed a laboratory technique based on a theory called recognition and recall that showed everyone fell within the 1,000 to 10,000 range. 
  
 This is despite humans typically living and interacting in groups of smaller than 100 throughout evolution. 
  
 For the study, 25 participants spent an hour writing down as many faces from their personal lives as possible, including those they went to school with, colleagues and family. 
  
 They then did the same for famous faces. 
  
 The participants found it easy to come up with lots of faces at first, but harder to think of new ones by the end of the hour. 
  
 That change of pace allowed the researchers to estimate when they would run out of faces completely. 
  
 The participants were also shown thousands of photographs of famous people, such as Barack Obama, and asked which ones they recognised. 
  
 The researchers required participants to recognise two different photos of each person to ensure consistency. ||||| The next time an old friend meets your greeting with a quizzical who-are-you stare, you’re right to take offence: new research suggests the average person can recognise 5,000 different faces. 
  
 Psychologists at the University of York embarked on the study after realising that for all the work scientists have done on faces, they had never nailed down, even roughly, the number of faces the average human knows. They say it is the first evidence-based estimate of this figure. 
  
 Through a series of recall and recognition tests on volunteers, the researchers discovered that the human ability to recognise faces varies enormously. The study found that people know between 1,000 and 10,000 faces of friends, family members, colleagues and celebrities, with most racking up about 5,000. 
  
 “We were quite surprised by how high the top end was,” said Mike Burton, a professor of psychology who led the research at the University of York. About 2% of the population are thought to experience “face blindness” or prosopagnosia. 
  
 “We’ve studied faces for years and years and the main thing we always find is that there’s a huge difference between our ability to recognise familiar versus unfamiliar faces. People are surprisingly bad at checking a real face against a photo ID, and yet we recognise friends and colleagues over a huge range of conditions,” said Burton. 
  
 “The brain is doing something different with familiar and unfamiliar faces and that has been at the heart of our science for a long time. But we realised we were missing something if we didn’t know how many familiar faces people do recognise.” 
  
 Given the social lives of our ancestors, the ability to recognise thousands of individuals might seem like overkill Rob Jenkins, University of York 
  
 The scientists asked volunteers to spend an hour recalling as many faces as they could from their private lives, covering old school friends, work colleagues, past partners and colleagues. They then moved on to famous faces: actors, musicians, sports stars, politicians and so on. By recording how the volunteers’ recall rates slowed down, the psychologists estimated when they would run out of faces. 
  
 In the next part of the study, the volunteers were shown thousands of photographs of famous people and tested on how many they recognised, even if they could not name the person. The scientists only counted an individual as recognised if the volunteer knew them from two different pictures. 
  
 The researchers arrived at the 5,000 figure by combining the results from both parts of the study. While the number may seem high, given that humans evolved in small groups, it may simply reflect the social importance of recognising friends and foes and vast number of faces we are now exposed to. Details of the work are published in Proceedings of the Royal Society B. 
  
 We underestimate the threat of facial recognition technology at our peril | Cynthia Wong Read more 
  
 “Given the social lives of our ancestors, the ability to recognise thousands of individuals might seem like overkill,” said Rob Jenkins, a psychologist at University of York and co-author on the study. “But there are plenty of examples of overkill in nature. The venom of some spiders can kill a horse, even though the spider presumably has no ambitions to eat the horse.” Equipped with such impressive facial recognition skills, it may be that we have little choice but to remember so many. 
  
 Burton said the research could ultimately improve automatic face recognition technology. Today’s best systems are good at spotting “strangers” but cannot outperform a human when it comes to recognising people the person is familiar with. “If we want to make the next step, we’ll need to start copying that,” said Burton. |||||
Output:
Humans have historically lived in groups of about 100, yet our facial recognition skills easily adapt to a modern world where we see endless faces each day, whether in person or on TV. A new study in Proceedings of the Royal Society B, the first to give an evidence-based estimate of how many faces the average human knows, puts the number at an impressive 5,000, though some participants recognized as many as 10,000, reports the Telegraph. "Given the social lives of our ancestors, the ability to recognize thousands of individuals might seem like overkill," but "we haven't yet found a limit on how many faces the brain can handle," University of York psychologist Rob Jenkins explains in a release. Twenty-five volunteers were given an hour to recall as many faces as possible—belonging to friends, acquaintances, famous people—and came up with 550 on average, reports Nature. They were then shown 3,441 faces of famous people and recognized 800 on average. Estimating "facial vocabulary" based on the ratio of famous faces recalled versus recognized, and how a person's recall rate slowed, researchers were "surprised by how high the top end was," co-author Mike Burton tells the Guardian. However, we have faults with the unfamiliar. For example, "people are surprisingly bad at checking a real face against a photo ID," Burton adds. (While it still has much to learn from our own abilities, facial recognition technology does better in this regard.)