Every publication is subject to bias and Wikipedia is no different. The fact that much of its content is user created should make most of us think twice before accepting the content as indisputable. However, unlike some other media (such as books and journals) Wikipedia actively seeks out bias and tries to be as much like an encyclopedia as possible. This is because many people would agree that an encyclopedia is as close as one can get to an unbiased source of information.
The simple fact that Wikipedia seeks to be unbiased is an important feature that has allowed it to rise in importance for those wishing to educate themselves. Wikipedia is conscious of its bias and welcomes constructive criticism. In a way, the glaringly obvious biases in some articles on Wikipedia are the cause for observers to question and change the content and keep the Wikipedia experiment alive.