A boy takes part in an air pressure demonstration during a science event "Mad Science Sundays" held at Kidspace Children Museum in Pasadena, California, the United States on August 27, 2017. (Xinhua/Zhao Hanrong)
Science event "Mad Science Sundays" held in Pasadena, California
Source: Xinhua| 2017-08-28 22:00:26|Editor: Song Lifang
KEY WORDS: science
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