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Science 20 April 2007:
Vol. 316. no. 5823, p. 354
DOI: 10.1126/science.316.5823.354a
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News of the Week

PHYSICS:
Colliding Clouds May Hone Physical Constants

Mark Anderson

According to work described in Nature this week, a new spin on the atomic clock could yield some of the most precise measurements to date of fundamental physical constants--potentially providing crucial experimental tests of a number of "theories of everything." (Read more.)

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