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Life's Precursors Ldentified In Meteorite

机译:陨石中确定的生命前体

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In June astrobiologists announced they had found a key component of genetic material within a meteorite. The discovery supports the idea that asteroid bombardment four billion years ago may have jump-started the emergence of life. Zita Martins of Imperial College London and her colleagues identified the organic molecules in the 4.6-billion-year-old Murchison meteorite, a carbon-rich rock that fell to Earth in Australia in 1969. Earlier researchers had detected subunits of DNA and RNA, called nucleobases, in the meteorite. But nobody could be sure whether the nucleobases were extraterrestrial or were simply soil contaminants.
机译:六月份,天体生物学家宣布他们在陨石中发现了遗传物质的关键成分。这一发现支持了这样的想法,即40亿年前的小行星轰炸可能已经开始推动生命的出现。伦敦帝国理工学院的Zita Martins和她的同事们发现了46亿年前的默奇森陨石中的有机分子。这种陨石是一种富含碳的岩石,于1969年落入澳大利亚地球。早期的研究人员检测到了DNA和RNA亚基陨石中的核碱基。但是没有人能确定核碱基是外星的还是仅仅是土壤污染物。

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