精选优质文档-倾情为你奉上主题：the earth and the universe编写：莘庄中学 AIn its 4.5 billion years, Earth has evolved from its hot, violent birth to the celebrated watery blue planet that stands out in pictured from space .But in a new book, two noted University of Washington astrobiologists say the planet already bas begun the log process of devolving into a burned-out cinder, eventually to be swallowed by the sun.By their reckoning, Earths “day in the sun” has reached 4:30 a.m., corresponding to its
