The best of the rest from the Physics arXiv this week:
A long-standing puzzle over the craftsmanship behind Viking bracelets and necklaces has finally been solved--mathematically.
A helicopter equipped with a robotic hand picks up small objects.
A spatial variation in the fine structure constant has profound implications for cosmology.
DoD research wing wants to make everything from tanks to bombers in "fabs."
A researcher describes a potential new source of renewable energy.
The private company has taken another step toward carrying astronauts to the International Space Station.
Gmail users can now make and receive calls.
Giving disabled babies the power of movement could improves their development.
Two reports out Tuesday argue it is, but what's most important--from an energy perspective--is what comes next.