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News
Geophysicists offer explanation for Andes formation Mar 15
Geophysicists in Australia think they may have solved the long-standing enigma of how the Andes mountain range was formed. Using computer simulations that model the fluid dynamics and mechanics of tectonic plates, they reckon that the Andes were formed when one tectonic plate in the Pacific slides or "subducts" under a neighbouring plate beneath South America in an uneven fashion. The existence of the Andes has baffled researchers because most other large mountain ranges, such as the Himalayas, have emerged where two plates collide head-on (Nature 446 308).
Nanowires could boost memory density Mar 15
Physicists in the US have devised a new technique that brings us one step closer to the possibility of using magnetic nanowires as high-density data storage devices. The technique involves moving magnetic domain walls -- the boundaries between regions of opposite magnetization -- along a nanowire using a much smaller spin-polarized current density than was possible before. The researchers claim that this breakthrough could lead to a new type of magnetic memory with up to 100-times the storage density of existing random-access memories (RAMs) (Science 315 1553).
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