Famed meteorite reveals early water on Mars—and an early outer space bombardment

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https://www.sciencemag.org/news/2020/11/famed-meteorite-reveals-early-water-mars-and-early-outer-space-bombardment

Source: By Paul Voosen. 

Excerpt: With just 15 grams of the 4.4-billion-year-old “Black Beauty” meteorite [from Mars] discovered in 2011 in the western Sahara, [Martin Bizzarro’s] team has revealed a record of asteroid impacts and volcanic eruptions spanning nearly all of martian history. One of the most surprising findings: After Mars underwent a pummeling early in its life, all went quiet—even during a time, nearly 4 billion years ago, when our Solar System was thought to have suffered a cataclysmic assault.... 

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