I would like to point out to my readers Scholarpedia. This represents a significant effort of the scientific community to grant a wiki-like resource with the benefit of peer-review. This means that articles are written on invitation and reviewed by referees chosen by the Editorial Board. This resource is important as correctness of information is granted by the review process and by the choice of the authors that are generally main contributors to the considered fields. It is interesting to point out that, currently, there are articles written by 15 Nobelists and 4 Fields medalists. The most relevant aspect to be emphasized is that the information is freely accessible to everybody exactly in the spirit of Wikipedia.