Martian lava rocks shed light on critical period of red planet's history
No matter how many missions to Mars she takes part in, the sheer joy of unearthing discoveries about the red planet never gets old for Mariek Schmidt.
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Astronauts on the ISS experience vision changes — should Mars travelers be worried?
According to a new study, 70% of astronauts who have spent between six and 12 months aboard the International Space Station ...