"Scitable is a free, high quality online science reference library brought to you by Nature Publishing Group (NPG).

Scitable currently covers the field of genetics, and will be expanding across other sciences over the next year.  Scitable’s content is commissioned and edited by editors at NPG, and peer-reviewed by the scientific community, so it is reliable, exhaustively researched, and carefully developed.

As journalists around the world of science have been writing recently, Scitable is the definitive online source for credible and comprehensive scientific information for non-scientists. "

Source:  email from Nature Publishing Group, July 28, 2009.