UNITED NATIONS, July 22 (Xinhua) -- With 2 trillion U.S. dollars flowing into global clean energy last year, the energy transition is "unstoppable," UN Secretary-General Antonio Guterres said Tuesday, ...

KUNMING, July 22 (Xinhua) -- Beneath the clear waters of Fuxian Lake in southwest China's Yunnan Province, nestled amid beautiful surrounding hills, lies a 518-million-year-old record of early animal ...