At $41,000, the Volt will be more expensive than a competing electric vehicle from Nissan.
The Library of Congress provides exceptions for circumventing copyright-protection software.
Some new search engines are seeking to rise above the tide of ad-driven media content.
The best of the rest from the Physics arXiv:
Galaxy clusters don't seem to have enough visible matter in them. Now astrophysicists think they know where it's hiding
For more than 30 years, sports scientists have puzzled over why the optimum angle of release for a shot put is not 45 degrees.
If a musical search engine called Tunebot is going to work, its creators will need you to sing to it.
Industry leaders and some geneticists criticize a damning government report.
Senator Harry Reid opts for a bill without carbon dioxide limits or renewable electricity standards.
The best of the rest from the Physics arXiv this week: