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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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The early Earth's oceans were home to a lot of interesting chemistry.
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Now scientists have found that amino acids thought to be present way back when could have been cooked into other compounds vital for life,
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an idea you should take with a grain of salt.
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Four billion years ago, the planet was probably covered by a salty ocean, dotted with volcanic islands and short lived continents.
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German researchers recently mimicked some of the chemistry taking place along the coasts of the volcanic islands.
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They created an approximation of primordial seawater.
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Then they evaporated it, to simulate what went on at those volcanic coasts.
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They baked the residue, creating salt crusts.
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At those high temperatures, amino acids interacted with metal ions in the salt crusts and were converted into other important biological molecules, such as pyrroles,
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which are part of the structures of chlorophyll in plants and hemoglobin in animals.
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The scientists presented their findings September 17th at the European Planetary Science Conference in Potsdam.
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Over hundreds of thousands of years, these novel compounds could have built up along the volcanic coasts, creating materials for the first living cells.
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Which were really worth their salt.
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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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显示原文 =This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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显示原文 =The early Earth's oceans were home to a lot of interesting chemistry.
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显示原文 =Now scientists have found that amino acids thought to be present way back when could have been cooked into other compounds vital for life,
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4 / 15
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显示原文 =an idea you should take with a grain of salt.
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5 / 15
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显示原文 =Four billion years ago, the planet was probably covered by a salty ocean, dotted with volcanic islands and short lived continents.
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6 / 15
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显示原文 =German researchers recently mimicked some of the chemistry taking place along the coasts of the volcanic islands.
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7 / 15
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显示原文 =They created an approximation of primordial seawater.
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8 / 15
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显示原文 =Then they evaporated it, to simulate what went on at those volcanic coasts.
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9 / 15
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显示原文 =They baked the residue, creating salt crusts.
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10 / 15
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显示原文 =At those high temperatures, amino acids interacted with metal ions in the salt crusts and were converted into other important biological molecules, such as pyrroles,
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11 / 15
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显示原文 =which are part of the structures of chlorophyll in plants and hemoglobin in animals.
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12 / 15
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显示原文 =The scientists presented their findings September 17th at the European Planetary Science Conference in Potsdam.
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13 / 15
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显示原文 =Over hundreds of thousands of years, these novel compounds could have built up along the volcanic coasts, creating materials for the first living cells.
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14 / 15
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显示原文 =Which were really worth their salt.
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15 / 15
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显示原文 =Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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- 单句循环：关
- 单句循环：×3
- 单句循环：×5
- 单句循环：∞