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Kissing Numbers, Sphere Packings, and Some Unexpected Proofs

Florian Pfender and Günter M. Ziegler

The authors report on recent progress by Musin, Cohn, and Elkies on optimal sphere packings, and review the background of a subject that touches many areas of mathematics.
(pp. 873)
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The Bowl Championship Series: A Mathematical Review

Thomas Callaghan, Peter J. Mucha, and Mason A. Porter

The authors undertook a mathematical analysis of the system used to determine the finalists in the United States college football championship series. Here they compare the current system and possible alternatives.
(pp. 887)
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