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Initial asteroid attacks on Mars could have made "vital ingredients for life"

Ancient asteroid attacks on Mars may have produced "vital ingredients for life." According to a recent study, once the Martian atmosphere was once right in hydrogen, eastern asteroid impacts produced solid forms of nitrogen known as nitrites and nitrates, which are "key ingredients of life." When NASA's Curiosity Rover discovered nitrate on Gale Crater, scientists did not know where it …

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