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Gadget recharging goes wireless Nov 14
You could soon charge your mobile phone by simply leaving it on a desk or tabletop, thanks to physicists at the Massachusetts Institute of Technology who have come up with a new way to power electronic gadgets without an electrical cable. Marin Soljacic and colleagues have devised a wireless technique that uses an electromagnetic field to transfer energy from a power source to a device several metres away (arXiv.org/physics/ 0611063).
Climbing plants get wrapped up Nov 14
Why can climbing plants twine around thin canes, but not around trees? This question has been playing on the minds of mathematicians in the US and France, who now claim to be able to predict the "critical radius" of the pole that a plant can climb (Phys. Rev. Lett. 97 184302).
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