Mark Helper traveled to the site of an asteroid impact on a remote Arctic island last summer to simulate a geological expedition on the moon.
Science & Technology - Space Exploration 
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Space Exploration Features
A crossroads in outer space: Two perspectives
In light of recent announcements about NASA's future, two aerospace engineering professors,...
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Opinion: Obama gets space funding right
Steven Weinberg received the Nobel Prize in Physics in 1979 and the National Medal...
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