Spotlight: Ukraine's academy of sciences, its president Paton celebrate 100th anniversaries

The 100th anniversary of the establishment of Ukraine's National Academy of Sciences (UNAS) and the 100th jubilee of its president Borys Paton, who chairs the academy since 1962, are celebrated at the National Opera House of Ukraine in Kiev, Ukraine, Dec. 7, 2018. (Xinhua/Chen Junfeng)