Science Advances (2026). DOI: 10.1126/sciadv.aeb1699"> A DNA-based nanoscale bio-memory circuit capable of low-power operation. Credit: Science Advances (2026). DOI: 10.1126/sciadv.aeb1699 Until now, molecular-level DNA circuits have mainly been used for simple tasks, such as detecting the presence of cancer-related substances. However, these systems have faced a key limitation: once a reaction occurs, the circuits cannot be reused. Overcoming this challenge, a research team has developed a DNA-based molecular computer that operates at a much smaller scale than conventional semiconductor devices, enabling both computation and memory within the same system. This advancement opens up new possibilities for future computing technologies in bio and medical applications, including disease diagnosis.…