Biology -- The Four Origins Mysteries

Author: Xie Wanming (Compiler)
Publisher:
Publish Date: 2002-08-01
Features: The world we depend on is so vast and so magnificent. Since humans became aware of their own existence, they have never stopped exploring and investigating their living environment. Einstein once said: "The fact that the world is understandable is the only thing that is truly incomprehensible." Now, our understanding ranges from 100 billion light-years away (the maximum visible distance of telescopes) to less than one billionth of a meter (the maximum resolution of microscopes). Where did such a highly intelligent and species as humans originally come from? How did they come to contemplate the mystery of their own origins? How did they uncover the answers to the mystery of their origins? Such questions are all under exploration. Do you know how many species of life exist in the world, where they came from, and where they are going? This book shows you how life emerged after the birth of the Earth, how organisms diversified into animals, plants, and microorganisms after their appearance. In the Precambrian period, about 600 million years ago, there were very few organisms on Earth. At the beginning of the Cambrian period, life underwent a development. Over the course of more than 300 million years in the Paleozoic era, aquatic life flourished first, then diversified. Some of them moved from water to land, and subsequently, terrestrial life achieved great success. In the Mesozoic era, reptiles dominated land, sea, and air, and dinosaurs ruled the Mesozoic era. Dinosaurs went extinct 65 million years ago, and mammals took their place, ushering in the era of mammals and angiosperms. Organisms have evolved in a spiral pattern from nonexistence to existence, from low to high, and from simple to complex, never stagnating at the same level.