This is an outstanding science resource which can be enhanced by visiting any of over 1,000 recommended, regularly reviewed web sites, or which stands alone as a complete, self-contained reference tool. It covers the whole field of science, including physics, chemistry, biology, information technology, earth sciences and astronomy. With up-to-date information on new fields such as genetic engineering, nanotechnology and the safeguarding of the environment. Each recommended web site is accompanied by a brief description of what you will find there and why we think it is worth visiting, from dissecting a frog to designing your own rollercoaster. It is thematically arranged with an intelligent system of cross-referencing and an extensive reference section including charts, glossary and a full index.