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 & astronomy. With up-to-date information on new fields such as genetic engineering nanotechnology & the safeguarding of the environment. Each recommended web site is accompanied by a brief description of what you will find there & 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 & an extensive reference section including charts glossary & a full index.