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Sea ice loss in the Arctic has triggered a critical tipping point that's destroying the food chain
研究人员表示,2009 年,北冰洋跨越了一个生物临界点,由于海冰范围急剧缩小,水中的硝酸盐含量突然开始下降。
How Did Stonehenge Get Its Altar Stone? New Research Adds to the Debate Between Human Effort and Glacier Transport
冰流模型和地质分析表明,在上一个冰河时代,冰川可能携带着部分石头。然而,科学家表示这种情况不太可能发生