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This is Scientific America's 60-Second Science, I'm Cynthia Graber. This'll just take a minute.
It’s hot to research life in extreme environments. There are organisms that thrive in boiling hot thermal1 vents2 and in toxic3 stews4. These extremophiles, as they’re called, might show how life could arise on other planets. Or they may provide info that helps solve environmental crises. A newly discovered extremophile is described in the May 23rd issue of the journal Science. Based on genetic5 analysis, it appears to be a type of archaea—a single-celled organism similar to but distinct from bacteria. The microbe lives about a mile below the ocean floor, in temperatures ranging between 140 to 212 degrees Fahrenheit6. There they munch7 on methane8 and other hydrocarbons9. They thus beat all previous sub-seafloor-life records for extreme conditions—twice as deep, twice as hot, and in sediment10 three times as ancient, more than 110 million years old. Scientists think that more than two-thirds of all the earth’s prokaryotes might live beneath the ocean floor. So they need to dig even deeper for a fuller picture of life on earth—and under it.
Thanks for the minute, for scientific America's 60-Second Science. I'm Cynthia Graber.
1 thermal | |
adj.热的,由热造成的;保暖的 | |
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2 vents | |
(气体、液体等进出的)孔、口( vent的名词复数 ); (鸟、鱼、爬行动物或小哺乳动物的)肛门; 大衣等的)衩口; 开衩 | |
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3 toxic | |
adj.有毒的,因中毒引起的 | |
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4 stews | |
n.炖煮的菜肴( stew的名词复数 );烦恼,焦虑v.炖( stew的第三人称单数 );煨;思考;担忧 | |
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5 genetic | |
adj.遗传的,遗传学的 | |
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6 Fahrenheit | |
n./adj.华氏温度;华氏温度计(的) | |
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7 munch | |
v.用力嚼,大声咀嚼 | |
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8 methane | |
n.甲烷,沼气 | |
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9 hydrocarbons | |
n.碳氢化合物,烃( hydrocarbon的名词复数 ) | |
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10 sediment | |
n.沉淀,沉渣,沉积(物) | |
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