Usage during a recent disaster highlights features that make the service so compelling.
The equivalence principle is one of the corner stones of general relativity. Now physicists have used quantum mechanics to show how it fails.
The best of the rest from the Physics arXiv this week:
Astrophysicists think they know how to destroy a black hole. The puzzle is what such destruction would leave behind
NOAA's tide data isn't all that precise - so a motley crew of seafaring hardware hackers is replacing it with data from their own environmental sensors
Self-sufficient wheeled robots lock together to make a larger, flying robot.
How do you devise an experiment that can detect exotic extraterrestrial lifeforms on the surface of other planets? Now physicists have unveiled a new piece of kit that could do the job
Removing ads from Web pages may be an attempt to push content creators toward the iPad and iPhone.
A computer science professor uses textual analysis of articles to beat the market.
Studying the interactions between people in ever increasing detail reveals entirely new patterns of human behaviour--and poses challenges for network science