Here is the English translation of the given content: "101 Geographical Mysteries That Kids Are Most Interested In"

Author: Liu Chang
Publisher:
Publish Date: 2006-07-01
Features: Little Doctor Tells You How Old the Earth Is? Since the time of our human ancestors, people have been pondering this question. As the only planet with life in the solar system, Earth did not always exist; it was formed during the formation of the solar system. Scientists believe that the solar system evolved from a massive nebula. The matter in this nebula rotated at high speed under the force of gravity, gathering into clumps. The largest clump formed the Sun, while the other larger clumps formed planets, including Earth. The geological age of the Earth is now generally estimated based on the decay laws of radioactive elements. Scientists have used this method to determine the ages of many ancient rocks on Earth. In recent years, scientists have measured the ages of meteorites that have fallen to Earth to be between 4.4 and 4.8 billion years, and the age of rock samples brought back from the Moon is approximately 4.6 billion years. After extensive calculations and necessary corrections, the international community now generally accepts 4.55 billion years as the geological age of the Earth. P7