Mystery solved! Blue strings are pre-stressed concrete, which is an awesome thing to exist. http://t.co/TM81NUItR2

ghelleks ...from Twitter 2013-03-28 0 Minutes

Mystery solved! Blue strings are pre-stressed concrete, which is an awesome thing to exist. http://t.co/TM81NUItR2

— Gunnar Hellekson (@ghelleks) March 28, 2013

Published by ghelleks

View all posts by ghelleks

Published 2013-03-28

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Published by ghelleks

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