本研究针对帝王花品种'北极冰'(Protea cynaroides cv. Arctic Ice)因花期限制影响市场潜力的问题，通过系统分析其双峰花序起始模式与物候特征，揭示了环境因子与内源因素协同调控的独特开花机制。研究发现冬季发育花序需20周成熟而夏季仅需16周，提出基于物候追踪 ...

The Batagaika crater in eastern Siberia, half a mile wide and growing, is the largest of many across the Arctic. As permafrost laced with buried ice thaws, the ground collapses, forming craters or ...

French President Emmanuel Macron on Sunday criticised US President Donald Trump's threats to annex Greenland, as he made a visit to the Danish autonomous territory. "That's not what allies do ...

STOCKHOLM, May 25 (Reuters) — Tage Thompson fired a sudden-death winner for Team USA as it claimed a thrilling 1-0 victory over Switzerland in the final of the International Ice Hockey ...