For many years, SpaceX CEO Elon Musk has been hellbent on sending humans to the surface of Mars. With the help of his space company's massive Starship rocket, the mercurial entrepreneur is hoping to build an entire city on the Red Planet — a massive undertaking that could be foiled by a surprising foe. As detailed in a recent study published in the journal GeoHealth last month, scientists found that substances found in Martian dust could be life-threatening to human space travelers, greatly imperiling their health during a mission to the Red Planet. While astronauts aren't reasonably expected to directly […]