Elsevier have recently announced http://www.scirus.com/, "a powerful new search engine developed for locating scientific information only" Of course, that is a bold claim, and can only be tested by conducting some searches. No doubt, the nature of the search will strongly influence the result. I decided to search for the term mobius and aromaticity largely because there is not a great deal known, and I am reasonably familiar with what is (in a narrow area, but not so much in a wider context) Unsurprisingly, http://www.scirus.com/ gave 6 Science direct articles our of the first 7 hits, and again unsurprisingly, gave no hits on articles published by other publishers! None of our own work was found, and the top hit looked distinctly out of the mainstream of the query. http://www..google.com/ on the other hand found an equally scientifically interesting selection, which of course excluded journal articles, and was indeed 100% orthogonal to scirus. I was flattered by having two of our articles in the top 8 here, including a talk I give on the subject. For comparison, SciFinder probably gives the "best" scientific selection, but this of course does not include Web pages, and WOS is only slightly inferior. Both COST money! Based on this single search, I would be reluctant to suggest that http://www.scirus.com/, was significantly better than Google, and in particular its inevitable focus on Elsevier journals to the apparent exclusion of others must be taken into consideration. Comments on what the "best" Scientific search engine is are welcome! -- Henry Rzepa. +44 (0)20 7594 5774 (Office) +44 (0870) 132-3747 (eFax) Dept. Chemistry, Imperial College, London, SW7 2AY, UK. http://www.ch.ic.ac.uk/rzepa/ chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)