documents some of the most astonishing science images t

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o show people the great and marvelous nature. Sandhill crane Light illuminates the sky, showing thousands of sandhill cranes on a river in Nebraska during their migration. The seamless co

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nnection between research and approval is the major reason behind the fast development of vaccines

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. BEIJING, April 14 -- China has approved three COVID-19 vaccine candidates for clinical trials,

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said an official with the Ministry of Science and Technology (MOST) on Tuesday. An adenovirus vec

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tor vaccine, developed by a research team led by C

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hen Wei, an academician with the Chinese Academy o

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f Engineering and a researcher at the Institute of

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Military Medicine under the Academy of Military S

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orld Health Organization. Accompanied by his daughter, Xiong Zhengx

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