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A new study reveals dolphins may be even smarter than we thought.
一项新的研究显示海豚比我们想的还要聪明。
Researchers recently discovered that the marine mammals can recognize themselves in a mirror at just seven months old, that’s even earlier than humans can.
研究人员最近发现海豚在7个月大的时候就能在镜子里辨认自己,比人类还早。
Children by comparison begin to swaying signs of self recognition at about a year old at the youngest.
相比之下,人类儿童最早能在一岁左右辨认他们自己。
Mirror self-recognition is often seen as an indicator of a species’self-awareness and level of intelligence.
能在镜子中分辨出自己被认作是一个物种自我意识和智力程度的标志之一。
Research has also shown it to be a sign of sensoryand motor development.
研究还发现这是感官和运动神经发展的一个标志。
Apart from dolphins, only a handful of other animals have shown self-directed behavior at a mirror including great apes, elephants and magpies.
除了海豚之外,只有少数的动物在镜子前有自我指导行为,包括类人猿,大象和喜鹊。
One of the authors of the study, which was published January 10th in the journal plus-1said the findings provide new insight into the "evolution of intelligence in the animal world."
该项研究于1月10号在plus-1 杂志上发布,其中一个作者称,这次发现为动物智力进化带来了新了解。
For United News International, I’m Neela Eyunni.
国际联合新闻, 我是妮拉。

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Question:
Which animal has shown self-directed behavior at a mirror ?
A tigers
B dogs
C elephants
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