Internet encyclopaedias go head to head.
Jimmy Wales' Wikipedia comes close to Britannica in terms of the accuracy of its science entries, a Nature investigation finds. UPDATE: see details of how the data were collected for this article in the supplementary information. UPDATE 2 (28 March 2006). The results reported in this news story and their interpretation have been disputed by Encyclopaedia Britannica. Nature responded to these objections . One of the extraordinary stories of the Internet age is that of Wikipedia, a free online encyclopaedia that anyone can edit. This radical and rapidly growing publication, which includes close to 4 million entries, is now a much-used resource.