The most revolutionary discoveries in science and technology often emerge from out-of-the-way places, forged by brilliant outsiders with few resources besides boundless energy and great ideas. This describes the 'biohacking' movement now in its early, heady days. Marcus Wohlsen introduces readers to some of these fascinating 'biopunks', including members of a San Francisco biohacker collective who are tinkering with strawberry genes, citizen scientists in London and a DIY biology meet-up in Brooklyn inserting squid genes into E.Coli.