Google's MapReduce algorithm turns a bunch of cell phones into a self-contained cloud computing environment.
Somewhere in a dark room in Germany, artificial "ants" demonstrate emergence by tracing one another's phosphorescent trails.
Flaps open and close to improve aerodynamics or air cooling as needed.
The best of the rest from the Physics arXiv this week:
Cheap green laser pointers can emit dangerous levels of infrared radiation, according to an investigation carried out by physicists in the US
Workers in Russia, Southeast Asia, and China are paid a pittance to solve millions of CAPTCHAS.
A process called pyrolysis makes biofuel and biochar, a fertilizer that keeps carbon in the ground.
Origamists have long suspected their art is computationally hard. Now they've proved it.
We need the "screen territory" available in a textbook, magazine, or A4 sheet of paper.
The companies release a proposal for legislation supporting an open Internet--with one big loophole.