Producing metallic hollow spheres is complicated: It has not yet been possible to make the small sizes required for new high-tech applications. Now for the first time researchers have manufactured ground hollow spheres measuring ...
Materials Science
Oct 13, 2009
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(PhysOrg.com) -- Evidence that early modern humans living on the coast of the far southern tip of Africa 72,000 years ago employed pyrotechnology - the controlled use of fire - to increase the quality and efficiency of their ...
Archaeology
Aug 13, 2009
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