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Science 27 September 2002:
Vol. 297. no. 5590, pp. 2220 - 2221
DOI: 10.1126/science.1076908
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Perspectives

PLANETARY SCIENCE:
Active Volcanism on Io

Alfred S. McEwen

Io, one of Jupiter's moons, has hundreds of active volcanoes, many of which are erupting high-temperature silicate lavas. In his Perspective, McEwen reviews how data returned by the Galileo spacecraft have helped to resolve some questions regarding Io's volcanism but have raised others, especially regarding the moon's internal structure.

The author is in the Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA. E-mail: mcewen{at}lpl.arizona.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)