The Encyclopedia Britannica Vs. Wikipedia
The Encyclopedia Britannica is one of the few sources that most people agree on for reliable, accurate information. It is often held as the standard for finding accurate information. The journal Nature ran a large-scale test of the information in Wikipedia entries versus the same entries in Encyclopedia Britannica. The results were startlingly similar.
Both publications had a number of errors, and both had roughly the same number of errors. According to Nature, Wikipedia had an average of 2.86 errors per article while Encyclopedia Britannica had an average of 2.92 mistakes per article.
Read more at Suite101: How Accurate is Wikipedia?