Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

目前研究生态系统变化的气候效应仍存在样地实验成本高和机理模型难以准确捕捉植被与气候的交互作用的挑战。本研究提出了一种更便捷的途径，将日间与全天水汽通量比作为“信使”，携带生物物理与生物地球化学过程的信息，反映生态系统内部的复杂性并提供一致的气候效应预 ...

BEIJING, Feb. 7 (Xinhua) -- Chinese President Xi Jinping on Friday exchanged congratulations with Colombian President Gustavo Francisco Petro Urrego over the 45th anniversary of bilateral diplomatic ...

同时， 目前的“退群潮”与其说是迫于国际治理体系的现状，不如说是各国国内政治立场的折射。

Scientists researching Alpine glaciers store ice in Antarctica. By analysing air bubbles in the ice they may be able to predict the future ...