When she started her career, physicist Dame Athene Donald took a decision that shocked her colleagues. She wanted to apply the strict rules of physics to the messy, complicated world of biology. Since then, she has taken the field of biological physics out of an unfashionable rut in the 1980s, and helped to turn into one of the most exciting and promising areas in science today. As Professor of Experimental Physics at the Cavendish Laboratory in Cambridge University, she studies the microscopic structure of everyday stuff, from plants to plastics. Jim Al-Khalili talks to Athene about her life and her passionate campaign to get more women working in science. Producer: Michelle Martin