The Time Machine

ERIC HAND

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The Time Machine

机译：时间机器

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The bits of rock on Scott Anderson's shelf are not much to look at, but they have stories to tell. In a plastic case is a greenish-grey rock, a 4.5-billion-year-old piece of the asteroid Vesta. Next to it rests a dark sliver of 2.8-billion-year-old lava from the Moon. Anderson, a planetary scientist at the Southwest Research Institute in Boulder, Colorado, picks up his favourite, a 1-gram slice of rock that cost him US$800. The flake came from Zagami, an 18-kilogram meteorite named after the Nigerian village where it was found in 1962. It is one of the rarest and most sought-after types of meteorite — a piece of Mars that was blasted into space by an asteroid impact and eventually landed on Earth. "Knowing what it is makes me excited to see it every time," Anderson says.

机译：斯科特·安德森（Scott Anderson）架子上的石头虽然没什么可看的，但它们有故事可讲。在一个塑料盒中是一块绿灰色的岩石，是一颗有45亿年历史的小行星Vesta。它的旁边是一条月球上有28亿年历史的熔岩的暗条。安德森是科罗拉多州博尔德市西南研究所的行星科学家，他最喜欢的东西是一块1克重的岩石，价格为800美元。该薄片来自Zagami，它是一种18公斤的陨石，以1962年在尼日利亚的村庄发现而得名。它是最稀有和最受欢迎的陨石之一-一颗被小行星炸毁进入太空的火星撞击并最终降落在地球上。安德森说：“知道它是什么让我很高兴每次看到它。”

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来源
《Nature》 |2012年第7408期|p.422424-425|共3页
作者
ERIC HAND;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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The Time Machine

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