Premier: China won't block rare earth exports

(AP) -- China is not using its control over supplies of rare earth - exotic metals crucial in advanced manufacturing - as a diplomatic "bargaining chip," state media quoted Premier Wen Jiabao as saying during a visit to ...

An astronaut's guide to out-of-Earth manufacturing

mprovising new stuff from the stuff you have is part of an astronaut's job description—think Apollo 13's crew refitting CO2 filters to save their own lives, or stranded Mark Watney in The Martian, feeding himself on the ...

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