When a century-old wheat market went electronic, it became a living laboratory for the impact of high-speed trading.
The sand flow through an hourglass is entirely different from a similar flow of liquid. But physicists say new measurements prove that conventional thinking about this problem is wrong.
Researchers set up adult Web sites to study how the industry makes its money and spreads malware.
The strike on Jupiter last year raises the likelihood of future impacts by an order of magnitude, says a new study. But what does it mean for the Earth?
What we'll charge for, and why.
Physicists have mounted the first successful attack of its kind on a commercial quantum cryptography system.
Scientists show how the social network could be mined for e-mail addresses.
The reusable launch vehicle makes its last voyage to space.
A trading strategy revealed in two new patents illustrates the high speed game of cat and mouse played by automated traders.
The best of the rest from the Physics arXiv this week: