In the future, genetically modified organisms could be making our medicines, our fuel, our housewares, our houses — and they could even help us remake ourselves. All that may sound like science-fiction, but the future is already arriving, in the form of the bioplastic bottle you may be holding in your hand. Harvard geneticist George Church lays it all out in a new book, "Regenesis: How Synthetic Biology Will Reinvent Nature and Ourselves," written with Ed Regis.