Physics World is a particularly good read this month. Highlights for me are:
- a historical piece (link) on why the US doesn't use the SI system (answer: the phenomenal bad luck of Joseph Dombey);
- a review article (link) on crowd dynamics, written by Andreas Schadsneider of the Hermes project. The videos on the web-version of this article are great fun. There's also a neat piece of tilt-shift photography (link) that reminds us that in a crowd we're really just a particle.
-- R
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