Cool Science Radio - David Quammen - The Tangled Tree

Science writer David Quammen joins the show. His new book is called The Tangled Tree: A Radical New History of Life. Quammen's book untangles the theory that has long been unheralded about our understanding of heredity - it’s called horizontal gene transfer and it makes up about eight percent of our genome. This is the story of evolutionary biology that you've never before heard.