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A comment on SpaceX is set to launch its first two test satellites on Sunday. Parent comment

Re:SpaceX is set to launch its first two test satellites on ... by thaumaturgy on Saturday February 17, 2018 @02:11PM (#16402166)
There will be no practical way to determine that until we've colonized it.
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Re:SpaceX is set to launch its first two test satellites on ... by jandrese on Saturday February 17, 2018 @02:19PM (#16402210)
Proving the existence of life is relatively easy: we just have to find some. Proving that Mars is lifeless is flat impossible. We can't even be sure our definition of life is sufficient.
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