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Space Junk Threatens Future Space Exploration

Hari Sreenivasan sat down with recently with Donald Kessler, former NASA scientist and expert on space junk, to talk about the who\'s and what\'s of orbital debris: how much is out there, what does it look like, what happens when these objects collide and what danger do they pose for future space travel and for us on Earth.
Length: 04:51

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