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Science  10 Mar 2000:
Vol. 287, Issue 5459, pp. 1707
DOI: 10.1126/science.287.5459.1707d

What's on trial? Patients and others interested in learning about ongoing clinical research can troll through this new database of over 4000 clinical trials, most sponsored by the National Institutes of Health. The site will eventually include more non-NIH and private studies.

Riding waves. It can be tough to tease out long-term patterns from the several-year spikes of geophysical phenomena such as sunspots and El Niño ocean warming. This tutorial on “wavelet analysis” takes readers through mathematical approaches and offers software for seeing these large-scale trends.

Engineering's greatest hits. Radio, highways, spacecraft, the Internet: These are among the top 20 engineering feats of the last century, according to a just-announced National Academy of Engineering list. Find out more at

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