For generations, the brain's most consequential transformations have unfolded in the spaces between what science could see — too slow for a snapshot, too fast for a lifetime of watching. Researchers at Johns Hopkins Medicine have built CloudScope, a cloud-connected miniature microscope that sits atop a freely moving mouse and streams continuous brain imaging for more than 24 hours, closing the gap between the pace of disease and the reach of human observation. Published in Nature Methods, the work represents not merely a technical advance but a philosophical shift: from studying the brain in f