We live in the age of information, but how often do we think about what has been lost—or nearly lost? From memories left on discarded machines to the voices of ancestors trapped on obsolete media, we are losing parts of human history each day. In theme-based seasons, Material Memory explores the effects of our changing environment—such as digital technologies, the climate crisis, or global human displacement—on our ability to access the record of our shared humanity, and the critical role that libraries, archives, museums, and other public institutions play in keeping cultural memory alive.