Why We Explore by National Aeronautics and Space Administr

36 pages missing pub info (editions)

nonfiction science challenging informative reflective medium-paced
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Welcome to "Risk and Exploration-Earth, Sea, and the Stars." Today's session is entitled "Why We Explore," but I'm hoping that, mostly, we can make it a dialogue, up close and personal. I'm John Grunsfeld. I'm the NASA chief scientist and an astro...

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