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Submission + - Forget space travel, it's just a dream (

An anonymous reader writes: The clash of two titans — physics and chemistry — are major barriers to human space travel to Mars and beyond, and may well make it impossible ... at least with current technologies.
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Forget space travel, it's just a dream

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After the last of 16 mounting screws has been removed from an access cover, it will be discovered that the wrong access cover has been removed.