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目前,地球赤道地区的平均温度接近30摄氏度,但在24亿年前,赤道地区的温度却类似于北极,保持在零下40摄氏度,那时的地球就像一颗“雪球”。研究人员表示,24亿年前整个地球处于“深度冰冻”状态,海洋结冰,厚度达300米。如果当时的地球存在生命,很可能生存于冰层之下的液态海洋里。科学家建立气候模型进行推演,发现当时的地球二氧化碳浓度下降,导致冰盖增长得更大,而白色的冰层将大量的
At present, the average temperature in the equatorial regions of the Earth is close to 30 degrees Celsius. But, 2.4 billion years ago, the temperature in the equatorial region was similar to that of the North Pole and remained at minus 40 degrees Celsius. At that time, the Earth was like a snowball. The researchers said that 2.4 billion years ago the entire Earth was in a state of “deep freezing” and the sea was icy with a thickness of 300 meters. If there was life on Earth at the time, it is likely to survive in the liquid ocean beneath the ice. Scientists to establish the climate model deduction and found that at that time the Earth’s carbon dioxide concentration decreased, resulting in a greater increase in ice sheet, while the white ice will be a lot of