Download or read book History of Planet Earth! Scientific Kid's Encyclopedia of Space - Cosmology for Kids - Children's Cosmology Books written by Professor Gusto and published by Professor Gusto. This book was released on 2016-06-21 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Did you know that the Earth is older than your ancestors? In fact, it is said to be about 4.5 billion years old! Turn the pages of this educational book to better understand the transformations the Earth has gone through throughout history. You will find lots of exciting facts that you would want to share with your friends!