From the first moment of creation, when the universe emerged with its magnificent order, to the complexities of evolution that shaped the astonishing diversity of life, this book takes you on a fascinating journey of knowledge to understand the secrets of living organisms. How did life arise from nothing? How were organisms able to reproduce and maintain their existence from generation to generation? What is the secret behind the delicate harmony between male and female in various forms of life? This book unveils the earliest stages of organisms' evolution, explains how reproductive mechanisms evolved, and why nurturing and care are essential for the continuation of life in some species, while others rely on different strategies for survival. Within the pages of this work, you will learn the deepest secrets of evolution, starting with Darwin's theories that laid the scientific foundations, through de Vries' hypothesis of sudden mutations, and arriving at modern concepts that explain the mechanisms of genetic change and adaptation to changing environments.