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Science  21 Aug 1998:
Vol. 281, Issue 5380, pp. 1107
DOI: 10.1126/science.281.5380.1107c

Pick your poison. Want to know where carbon tetrachloride winds up in the environment, or what kind of mutations benzene can cause? Try the new free Web version of the National Library of Medicine's TOXNET system. Its 19 toxicology databases covering thousands of chemicals include literature references and the Hazardous Substances Data Bank. toxnet.nlm.nih.gov

Almost R2-D2. See the Smithsonian's Material World exhibit through the eyes of Minerva, an “intelligent” robot that learns about its environment. The virtual tour takes place on 27 August from 6 to 8 p.m. EDT. www.si.edu/lemelson/minerva.htm

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