Dr. Meijer's day job is as a "brain electrophysiologist" studying biological rhythms in mice. She relished the chance to get out of the laboratory and study wild animals, and in a way that no one else had.

梅杰的正职工作是研究小鼠生物节律的“脑电生理学家”。她非常享受走出实验室，以前所未有的方式研究野生动物的机会。

She said Konrad Lorenz, the great-grandfather of animal behavior studies, once mentioned in a letter that some of his caged rats had escaped and then returned to his garden to use running wheels placed there.

她说，动物行为研究的鼻祖康拉德·洛伦茨(Konrad Lorenz)曾在一封信中提到，有些被他关在笼子里的大鼠逃走后，又回到他的花园，到放在那里的跑轮上跑步。

But, Dr. Meijer said, the Lorenz observation "was one sentence."

但是，梅杰说，洛伦茨的观察“只是一句话”。

For the experiment, the wheels were enclosed so that small animals could come and go but so that larger animals could not knock them over. Dr. Meijer set up motion sensors and automatic video cameras. Several years and 12,000 snippets of video later, she and Yuri Robbers, also a Leiden researcher, reported the results. They were released online Tuesday in the Proceedings of the Royal Society B.

为了进行试验，跑轮被围了起来，这样小动物就能来去自由，大动物则无法把它们撞翻。梅杰安放了运动传感器和自动摄影机。她和同为莱顿研究人员的尤里·罗伯斯(Yuri Robbers)报告称，几年后，他们获得了1.2万个视频片段。周二，这些结果被公布在了《英国皇家学报B》(Proceedings of the Royal Society B.)的网站上。

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