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This is Scientific American’s 60-Second Science. I’m Karen Hopkin. This will just take a minute.
In the spring of 1912 an iceberg1 in the Atlantic took down the Titanic2. Now, some humble3 bacteria are trying to finish the job. Scientists analyzing4 rust5 from the sunken ship have discovered a new species of microbe that eats iron. Their findings are described in the International Journal of Systematic6 and Evolutionary7 Microbiology.
Researchers have been studying the Titanic’s remains8 since they were discovered resting more than two miles beneath the ocean surface. And they’ve found that the ship has been not-so-slowly disappearing. Visitors have removed artifacts, and the hull9 is festooned with rusticles: icicle-shaped accretions10 of iron oxide11, otherwise known as rust.
Nearly 20 years ago scientists took samples of that rust, and found that it harbors a mix of iron-munching microbes. Now, analyzing the DNA12 of these organisms, researchers have catalogued more than two dozen strains of bacteria, including a new one they’ve dubbed13 Halomonas titanicae.
The bacteria are bad news for the Titanic, which may only last another 20 years, say the scientists. The good news is such bugs14 could be used to hasten the decay of other, less cinematic wrecks15.
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Karen Hopkin.
1 iceberg | |
n.冰山,流冰,冷冰冰的人 | |
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2 titanic | |
adj.巨人的,庞大的,强大的 | |
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3 humble | |
adj.谦卑的,恭顺的;地位低下的;v.降低,贬低 | |
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4 analyzing | |
v.分析;分析( analyze的现在分词 );分解;解释;对…进行心理分析n.分析 | |
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5 rust | |
n.锈;v.生锈;(脑子)衰退 | |
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6 systematic | |
adj.有系统的,有计划的,有方法的 | |
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7 evolutionary | |
adj.进化的;演化的,演变的;[生]进化论的 | |
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8 remains | |
n.剩余物,残留物;遗体,遗迹 | |
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9 hull | |
n.船身;(果、实等的)外壳;vt.去(谷物等)壳 | |
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10 accretions | |
n.堆积( accretion的名词复数 );连生;添加生长;吸积 | |
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11 oxide | |
n.氧化物 | |
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12 DNA | |
(缩)deoxyribonucleic acid 脱氧核糖核酸 | |
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13 dubbed | |
v.给…起绰号( dub的过去式和过去分词 );把…称为;配音;复制 | |
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14 bugs | |
adj.疯狂的,发疯的n.窃听器( bug的名词复数 );病菌;虫子;[计算机](制作软件程序所产生的意料不到的)错误 | |
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15 wrecks | |
n.沉船( wreck的名词复数 );(事故中)遭严重毁坏的汽车(或飞机等);(身体或精神上)受到严重损伤的人;状况非常糟糕的车辆(或建筑物等)v.毁坏[毁灭]某物( wreck的第三人称单数 );使(船舶)失事,使遇难,使下沉 | |
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