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Chinas Yangtse (Jangtsekiang) und der Drei-Schluchten-Staudamm - YouTube
https://www.youtube.com/watch?v=yjX9e0eKFb4
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Asteroid Initiative Workshop Plenary Session - YouTube
https://www.youtube.com/watch?v=aWq_nPuLZig
NASA TV coverage of the plenary session of the NASA-hosted public workshop at the Lunar and Planetary Institute in Houston to examine 96 of the ideas submitt...