Storing energy with flying metal objects
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Pentadyne twirls weights in the air, and it makes electricity.
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Scientists are working on a tethering system that could help explorers with the prospect of walking on a surface without much sticking power.
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US scientists develop tiny energy-generating fibres that could be used to create self-powered smart fabrics.
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Photovoltaics made of nanowires could power small devices and lead to cheaper solar panels.
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The ability to manipulate matter on a tiny scale could lead to environmental breakthroughs. Billions of dollars are being spent, but the most exciting green nanoproducts are still on the drawing boards.
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Using magnets to hold trains in the air so they can travel at speeds comparable to planes has long been a goal for making long-distance travel enjoyable.
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One that's perhaps a bit of both: The Flying Bike would let users ride a stationary bike that is integrated into a video game.
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By exploiting the physics of how light reflects off of pits in a plastic surface, researchers have come up with a method for storing 1,000 gigabytes of data on a DVD-size disk.
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Exotic materials and cheaper substrates could lead to better photovoltaics.
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An electrical pulse through nanotubes and wires helps find the crack in an airplane wing while in-flight.
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Concerns over exploding computer  batteries may be heating up, but alternative power sources for  portable devices like laptops, music players and cellphones  could still be up to 10 years away.
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Researchers are goading tiny organisms like bacteria and algae into producing fuels like hydrogen and methane. The process is not useful yet, but the technology could be a solution to the energy problem. By Amit Asaravala.
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Rethinking some banal and non-techy energy stuff, such as corn and wood, and you get ... a corn-powered house, anyone? Plus: The green glow, from environmental economics to using algae as a solar collector. Mark Anderson reports from the MIT Energy 2.0 conference in Autopia.
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Scientists have begun designing a new generation of weapons meant to be sturdier and more reliable.
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Particles that capture infrared light could allow everyday objects to tap into an under-exploited source of energy.
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An electronic device that uses spinach to convert light into electrical charge has been developed by US researchers. Shuguang Zhang at Massachusetts Institute of Technology, US, and research collaborators
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Physicists have dreamt about it for decades: harnessing the fusion process that powers the sun to make clean, safe and limitless energy.Comment