Full video: Shenzhou-14 crew's first livestream lecture from China Space Station

China livestreamed its first science class from the Wentian lab module of the space station on Wednesday. It's the first class delivered by the Shenzhou-14 taikonauts – Chen Dong, Liu Yang and Cai Xuzhe – who were sent to the space on June 5 for a six-month mission. 

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