Two scientists tell us that the future of space exploration and colonization lies in one-way trips.  Dirk Schulze-Makuch and Paul Davies explain in the latest copy of the Journal of Cosmology that such trips will be the best plan for the colonization of Mars and would be no different from the early settlers to the New World who left Europe for North America with little hope of ever seeing home again.  Mars, they claim, should be easy to colonize because it has surface gravity, an atmosphere, ...
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