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Science  01 Oct 1999:
Vol. 286, Issue 5437, pp. 7
DOI: 10.1126/science.286.5437.7b

Search me. PubMed, the National Library of Medicine's site for searching MEDLINE and other databases, is bigger and better. New features include biweekly stories linked to tutorials on bioinformatics, a clipboard function that saves up to 500 selected articles from different searches, new search options, and access to more databases.

Prime time. Wrap your mind around one of math's longest running engagements, the search for Mersenne primes. Thirty-eight of these numbers, which take the form 2n - 1, have been described; the largest so far has an exponent of 6972593. Check out 500 years of history, theorems, and proofs, as well as related math problems waiting to be solved.

The sound of science. National Public Radio's whimsical program Sounds Like Science aired its final episode on 26 September, but the show will live on. Visit the archives to pick up fun factoids about animals, space, or technology (they make perfect cocktail party banter); test your science trivia skills; or listen to 2 years' worth of witty shows.

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