Some artworks are made of wood, pigment, clay or woven fibres. Others are made of browsers, buttons, scripts, glitches and operating systems - fragile digital environments that change as technology moves on. This is born-digital art. Digital things don’t survive on their own. A missing plug-in, a browser update, an operating system that no longer exists, and a work can disappear overnight. What does it mean to care for an artwork whose environment keeps changing?