If advanced civilisations have mined their asteroid belts, we should be able to see the evidence, argue astronomers
Google's chief economist says search saves us 3.75 minutes a day -- but compared to what?
Symmetry is intimately linked to conservation laws in the real Universe. Now physicists have worked out how to use the same approach in a virtual one
'Fuzzy hashing' was invented to flag spam emails, but has found application in everything from malware detection to genome sequence alignment
Bill Atkinson invented everything from the menu bar to hypercard--the program that inspired the first wiki.
The first analysis of nuclear fission products in the atmosphere over Seattle provides a unique insight into the nature of the disaster.
The best of the rest from the Physics arXiv this week
The famous 11-year solar cycle often has two peaks rather than one and now one astronomer says she knows why
'Dating sims' are coming to the U.S. in some form or another--why not on a social network?
An Orion spacecraft, an artificial intelligence rocket, and a new multi-mission approach to exploration.