标题： 地球的简要历史 显示英文标题

标题： A brief History of the Earth

摘要： 增加的引力常数$G$的可能性及其对地球历史的影响被讨论。 该模型与地球物理和天文学数据一致。 该模型预测早期时期的天数与从化石珊瑚中获得的数据一致。 该模型预测地球最初是寒冷的，并在其演化过程中逐渐变暖。 $G$变化的精确规律仍需通过地球参数随宇宙膨胀的变化来获得。 显示英文摘要

摘要： The possibility of an increasing gravitational constant $G$ and its implication on the Earth's history are discussed. The model is consistent with geophysical and astronomical data. The number of days in early epochs predicted by the model is in agreement with those obtained from fossil corals. The model predicts that the Earth was initially cold and is gradually heating up during its course of evolution. The exact law for the variation of $G$ is still to be obtained from the variation of the Earth's parameters with cosmic expansion.