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OpenStudy (anonymous):

HELP PLEASE !?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!! 5 sentences Scientists in the field of space exploration believe that when and if humans travel to Mars, the trip will be one way. In part, this could be due to how long it will take to get there, and in part, it could be due to people’s inability to adapt back to Earth's gravitational field after living on Mars. In what ways might travel to, exploration of, and settlement of Mars be comparable to Europe's exploration and settlement of the Americas? Compare the possible hardships, the reasons people might decide to take such a

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