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Science 1 November 2002:
Vol. 298. no. 5595, pp. 979 - 980
DOI: 10.1126/science.1075555
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Perspectives

AURORAL AND SPACE PHYSICS:
The Heavens in a Pile of Sand

Mervyn P. Freeman and Nicholas W. Watkins

Recent studies have shown that the intricate spatial and temporal patterns displayed by Earth's aurora are fractal, that is, they are the same when viewed on any scale. In their Perspective, Freeman and Watkins discuss the evidence for this fractal behavior and ask how it may arise.

The authors are with the British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 0ET, UK. E-mail: mpf{at}bas.ac.uk

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