Human laughter has robust roots in our animalian past, said Jaak Panksepp, a professor of psychobiology at Bowling Green State University in Ohio.

 
  • 研究结果同时表明,笑和喜悦并不只是人类所特有的,早在人类会笑之前,其它一些动物就已经拥有原始形态的笑声了。
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