The Evolution of Hair

How does an organism that previously didn't have any hair begin just start expressing hair, no matter what the time line is? Yes, there's the great so this is like the subject of my new book called some assembly required. So how does some let's go back to this fishy, footy type of situation a. S kind of a hanging out on on land a. I'm imagining it shifting into kind of mammal territory. That's the growthing of the growth of hair begins. And the answer is no. Everything has antecedents. The genes that make hair, that build, say, our hair, were originally used to make their outer body layers and other animals,.