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Comment Re:Darn that dirty hydrogen (Score 1) 406

by Trails (#39580621) Attached to: Self-Sustaining Solar Reactor Creates Clean Hydrogen

The thing about producing H2 from water is there's nothing to ship. A power facility only needs a source of clean water, and some reclamation of that might be possible. Certainly running H2 around in pipes under pressure when there's water EVERYWHERE is unnecessary, or at least less efficient than deploying sufficient amounts of these reactors, or just transmitting power.
Technology

Self-Sculpting "Sand" Can Allow Spontaneous Formation of Tools 124

Posted by samzenpus from the shape-of-a-sand-tool dept.
parallel_prankster writes "Researchers at MIT are developing tiny robots that can assemble themselves into products and then disassemble when no longer needed. 'A heap of smart sand would be analogous to the rough block of stone that a sculptor begins with. The individual grains would pass messages back and forth and selectively attach to each other to form a three-dimensional object; the grains not necessary to build that object would simply fall away. When the object had served its purpose, it would be returned to the heap. Its constituent grains would detach from each other, becoming free to participate in the formation of a new shape.' To attach to each other, to communicate and to share power, the cubes use 'electropermanent magnets,' materials whose magnetism can be switched on and off with jolts of electricity."

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