A new study, conducted by researchers at the Palo Alto Research Center in California, has shown that Wikipedias ascendancy to the top of a large pool of online reference sites may be coming to an end because the community-created encyclopaedia has become less welcoming to new contributors.The research team has warned that the changes could compromise the encyclopaedias quality in the long term. Its easy to say that Wikipedia will always be here. This research shows that is not a given, New Scientist quoted Ed Chi, a senior scientist at the Palo...