The web has evolved from web 1.0 to the current web 2.0. The former refers to the fact that information was added to the web in a much more controlled manner by a few expert people. Web 2.0 on the other hand uses a much more "collective intelligence" with lots more people contributing - Wikipedia for instance.The scientific magazine, Nature, undertook a study to evaluate the accuracy of the Encyclopaedia Britannica to that of Wikipedia. The results showed that the traditional encyclopaedia did indeed have fewer errors - but only slightly less than Wikipedia. The 42 experts who contributed to the study discovered that Wikipedia had 4 serious errors on the data researched, but interestingly Britannica did as well!