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Duncan Watts directs the Human Social Dynamics group at Yahoo! Research and is formerly a professor of Sociology at Columbia University.

(PhysOrg.com) -- Scientists from IBM's T. J. Watson Research Center and Columbia University, working with the X-Ray Microscopy Group, have mapped rotation and strain fields across a silicon-on-insulator (SOI) structure that included a liner of stressed Si3N4 using X-ray nanodiffraction (nano-XRD) at the CNM/APS Hard X-Ray Nanoprobe beamline.

(PhysOrg.com) -- With the Large Hadron Collidor (LHC) running smoothly for well over a year now, the excitement surrounding the possibility for the discovery of new physics has generated a few rumors - speculations that have not been published in peer-reviewed journals. The latest came last week, when an anonymous person posted the abstract of a note on Columbia University mathematician Peter Woit’s blog that claimed an intriguing observation.

India is running out of water for crops. Most of the water-intensive agriculture in the nation takes place in Punjab, a state in the northwest that makes up 2 percent of the country’s territory but provides more than 50 percent of its grain reserves. Farmers there currently pump out 45 percent more groundwater than is replenished by monsoon rains