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This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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Have you ever run into a former acquaintance and discovered that you can't remember his name?
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This awkward situation is apparently alien to dolphins, who can recall old companions up to two decades later.
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As a recent 60-Second Science podcast explained, dolphins have signature whistles that may serve as individual names.
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But how long do they remember their friends' titles?
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To find out, researchers looked at 43 captive dolphins that have moved among the same six facilities, living together in different combinations at various times.
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When the scientists played unfamiliar signature whistles for each dolphin, the test subjects quickly grew bored.
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But when the dolphins heard recordings of the signature whistles of former companions, they moved towards the speakers and even whistled back at them.
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The study is in Proceedings of the Royal Society of London B.
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Not even a separation of 20 years could dim the memory of one particular dolphin,
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which suggests these mammals may have lifelong social memories.
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Perhaps it's time to change the old axiom about elephants to "a dolphin never forgets."
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Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.
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显示原文 =This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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显示原文 =Have you ever run into a former acquaintance and discovered that you can't remember his name?
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显示原文 =This awkward situation is apparently alien to dolphins, who can recall old companions up to two decades later.
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4 / 13
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显示原文 =As a recent 60-Second Science podcast explained, dolphins have signature whistles that may serve as individual names.
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5 / 13
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显示原文 =But how long do they remember their friends' titles?
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6 / 13
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显示原文 =To find out, researchers looked at 43 captive dolphins that have moved among the same six facilities, living together in different combinations at various times.
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显示原文 =When the scientists played unfamiliar signature whistles for each dolphin, the test subjects quickly grew bored.
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显示原文 =But when the dolphins heard recordings of the signature whistles of former companions, they moved towards the speakers and even whistled back at them.
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9 / 13
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显示原文 =The study is in Proceedings of the Royal Society of London B.
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显示原文 =Not even a separation of 20 years could dim the memory of one particular dolphin,
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11 / 13
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显示原文 =which suggests these mammals may have lifelong social memories.
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12 / 13
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显示原文 =Perhaps it's time to change the old axiom about elephants to "a dolphin never forgets."
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13 / 13
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显示原文 =Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.
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- 单句循环：关
- 单句循环：×3
- 单句循环：×5
- 单句循环：∞