Biomolecular condensates have long been considered simple liquid droplets inside cells. The researchers revealed that some of them are supported by fine protein fibers that form an internal scaffold. This structure represents the hidden architecture in the cell droplets. When this structure is disrupted, cells cannot grow and divide properly. The discovery suggests that scientists may in the future design drugs that target the architecture of the condensates. These drugs could fight cancer and neurodegenerative diseases like ALS.