The best of the rest from the Physics arXiv preprint server
A new type of fuel cell could make CO2 storage cheaper, but it could also prove to be a good way to pump more oil out of the ground.
If you tweet about a TV show or its ads, don't be surprised if the advertisers "sponsored tweet" you back.
A roundup of the most interesting stories from other sites, collected by the staff at MIT Technology Review.
Another chance to catch the most interesting, and important, articles from the previous week on MIT Technology Review.
In your DNA are clues to your health, your ancestry, and maybe even your purchasing preferences.
Most teenagers deliberately hide what they are really talking about on Facebook - a practice that could make it harder to pitch ads at them.
Formlabs is bringing down the costs of a better 3-D printing technique, but it must survive a patent lawsuit.
A hydrocarbon-sorting material could replace energy-intensive oil refining steps.
Spacecraft could determine their position anywhere in the solar system to within five kilometres using signals from x-ray pulsars, say astronomers.