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Why Mars Matters. The successful landing of NASA's Perseverance rover on Mars is about far more than scientific curiosity or national prestige. For the sake of humanity's long-term survival, it is imperative that we embrace our technological know-how to establish life beyond planet Earth. (Opinion)

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« Crew of the Russian segment of the ISS continues to search for a potential third hull crack that's leaking air; they've been finally able to get their new microscope working, but all they've located thus far are, quote, "not the defects that we are looking for".

Exoplanets’ magnetic poles likely wander and flip like Earth’s do. But although such reversals might make it harder for alien life to thrive, they don't necessarily preclude it. »