15 Noviembre 2012
El metal mas ligero del mundo (FYI: What's The Lightest Metal On Earth?) http://t.co/zWU21MBM
November 15, 2012
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FYI: What's The Lightest Metal On Earth?
The lighter a structure launching into air, the better. That's one of the reasons why ostriches can't fly--because their bones are solid instead of
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