For centuries, people have relied on materials such as concrete, steel, and wood for the construction of buildings, bridges, and other structures. However, researchers have started exploring a far less conventional material for building therapeutics at the molecular level—DNA. In this episode, Charlene Lancaster from The Scientist spoke with Björn Högberg, a professor of biophysics at the Karolinska Institute, to learn how his team is developing DNA-based nanorobots to fight cancer. The Scientist Speaks is a podcast produced by The Scientist’s Creative Services team. Our podcast is by scientists and for scientists. Once a month, we bring you the stories behind news-worthy molecular biology research. This month's episode is sponsored by Crown Bioscience.