Der er et problem vi må klare når det gælder en Mars mission som aldrig dukkede op i Apollo-programmet og det er hvordan vi beskytter menneskekroppen under lange perioder i rummet og på planetens overflade.
There is a fundamental problem that we're going to have to deal with in terms of a Mars mission that was never the case with the Apollo program, and that is the human body and how do we protect it for long, long periods in space and on the planet's surface.