Life is fascinating, but when did life on our earth begin? The story begins with a simple microbe. To understand how life exists on earth we have to delve into the world of atoms, microbes, DNA and genes. What differentiates plant life and animal life? How do we inherit traits from our parents and how do we pass on our traits to our offspring? How did multiple species develop from a few simple species? Most important, how did life of any kind come about in the first place? In this book, we try to understand all this through a scientific method.