As a paleontologist, Neil Shubin has spent most of his life time working on fish. In this book, Shubin strongly talks about the relationship between fish and vertebrate land creature. It emphasizes on three main parts. The first part is the similarity of the body shape and body function between fish and vertebrate land creature. The second part is about microbiology. It explains human are the product of a succession of life forms from an original cell. The last is the relationship and transition between fish and amphibians. “Our hands resemble fossil fins, our heads are organized like those of long-extinct jawless fish and major parts of our genomes still look and function like those of worms and bacteria.” said Neil Shubin. As Shubin states