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Would lack of oxygen/suffocation or lack of pressure/blood or body fluids boiling kill her first?

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    $\begingroup$ It's a duplicate, Mars' atmosphere is so thin it's really the same question. $\endgroup$
    – GdD
    Commented Oct 22, 2018 at 8:10
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    $\begingroup$ To remove the helmet, the astronaut has to depressurize his suit first. But with no pressure in his suit, he would not be able to take off his helmet anymore. $\endgroup$
    – Uwe
    Commented Oct 22, 2018 at 9:56

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