Witness the crash of a moon lander in a recent test, an embarassing oops! after so many wins, the most recent -- and perhaps most extraordinary in some time -- the safe landing of the one-ton rover Curiosity on Mars.
No surprise: Building knowledge, and finding your way along in the dark, is slower than running down familiar routes in broad daylight. It's especially true, out on the edge, where no one has been before.
Starting a path is a lot trickier than following a rut.
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Like to experience space exploration fever even though crewmember applications are closed? Cornell University and the University of Hawaii have some specs posted for their 120-day, simulated Mars mission:
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